{"id":3970,"date":"2026-09-15T23:45:45","date_gmt":"2026-09-15T20:45:45","guid":{"rendered":"https:\/\/www.defencemetal.com\/?p=3970"},"modified":"2026-09-17T23:06:48","modified_gmt":"2026-09-17T20:06:48","slug":"ti-grade-1-ti-grade-2-difference","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/ti-grade-1-ti-grade-2-difference\/","title":{"rendered":"What Is the Difference Between Ti Grade 1 and Ti Grade 2?"},"content":{"rendered":"<p><strong>Ti Grade 1<\/strong> and <strong>Ti Grade 2<\/strong> are the two basic grades of commercially pure titanium. Neither contains alloying elements; the difference between them is only in the <strong>permitted impurity levels<\/strong> \u2014 and in titanium that means strength directly.<\/p>\n<h3>Oxygen sets the strength<\/h3>\n<p>In pure titanium, oxygen is not an impurity but effectively a strengthener. In Grade 1 oxygen is <strong>\u22640.18%<\/strong>, in Grade 2 <strong>\u22640.25%<\/strong>. The iron limit in both is in the \u22640.20\u20130.30% range.<\/p>\n<p>That small difference is reflected directly in the mechanical values: the yield strength of Grade 1 is <strong>\u2265170 N\/mm\u00b2<\/strong> against <strong>\u2265275 N\/mm\u00b2<\/strong> for Grade 2. Tensile strength rises from 240 to <strong>345 N\/mm\u00b2<\/strong>. In exchange, Grade 1 stays more ductile: elongation <strong>\u226524%<\/strong> (\u226520% in Grade 2) and hardness <strong>\u2264120 HB<\/strong> (\u2264150 HB in Grade 2).<\/p>\n<p>In terms of corrosion resistance there is no practical difference between the two grades; both behave excellently in seawater, chlorides and many acid environments.<\/p>\n<h3>Comparison in numbers<\/h3>\n<div style=\"overflow-x:auto;border:1px solid #d7dfe4;background:#fff;margin:10px 0 26px;\">\n<table style=\"border-collapse:collapse;width:100%;font-size:15px;\">\n<thead>\n<tr style=\"background:#DD3333;color:#fff;\">\n<th style=\"padding:12px 14px;text-align:left;color:#ffffff !important;background:#DD3333;\">PROPERTY<\/th>\n<th style=\"padding:12px 14px;text-align:left;color:#ffffff !important;background:#DD3333;\">Ti Grade 1<\/th>\n<th style=\"padding:12px 14px;text-align:left;color:#ffffff !important;background:#DD3333;\">Ti Grade 2<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Oxygen (O)<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.18%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.25%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Iron (Fe)<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.20%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.30%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Nitrogen (N)<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.03%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.03%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Carbon (C)<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.08%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.08%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Hydrogen (H)<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.015%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 0.015%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Tensile strength Rm<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 240 N\/mm\u00b2<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 345 N\/mm\u00b2<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Yield strength Rp0.2<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 170 N\/mm\u00b2<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 275 N\/mm\u00b2<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Elongation<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 24%<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2265 20%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Hardness<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 120 HB<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">\u2264 150 HB<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Density<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">4.51 g\/cm\u00b3<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">4.51 g\/cm\u00b3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Modulus of elasticity<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">105 kN\/mm\u00b2<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">105 kN\/mm\u00b2<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">Thermal conductivity<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">21 W\/m\u00b7K<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">20 W\/m\u00b7K<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">UNS<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">R50250<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">R50400<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;font-weight:600;color:#20303c;\">AMS<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">4940<\/td>\n<td style=\"padding:11px 14px;border-bottom:1px solid #d7dfe4;color:#41525c;\">4902 \u00b7 4941 \u00b7 4942 \u00b7 4951<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:13px;color:#6b7a84;margin-top:-16px;\">Values are taken from our product datasheets; section thickness and the applied heat treatment regime change the result.<\/p>\n<h3>Which one, and when?<\/h3>\n<p><strong>Ti Grade 1 is preferred<\/strong> \u2014 parts requiring deep drawing and complex forming, thin sheet and foil applications, explosive cladding, anode structures, heat exchanger plates. Anywhere formability matters more than strength.<\/p>\n<p><strong>Ti Grade 2 is preferred<\/strong> \u2014 chemical and marine industry piping, pressure vessels, pump bodies, architectural cladding, general purpose titanium parts. It is the \u201cstandard\u201d grade of pure titanium; it is the most widely used CP titanium in the world and the easiest to source.<\/p>\n<h3>The other members of the family<\/h3>\n<p>For higher-strength pure titanium there is <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/ti-grade-4\/\">Ti Grade 4<\/a>; for alloyed titanium, see our <a href=\"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/ti-grade-2-ti-grade-5-difference\/\">Ti Grade 2 \u2013 Grade 5 comparison<\/a>.<\/p>\n<div style=\"border:1px solid #d7dfe4;border-left:4px solid #24BEE5;background:#f7fafb;padding:18px 20px;margin:26px 0;\">\n<p style=\"margin:0 0 10px;font-weight:700;color:#20303c;\">Technical datasheets<\/p>\n<p style=\"margin:0 0 6px;\"><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/ti-grade-1\/\">Ti Grade 1 \u2014 chemical composition, mechanical values, standard equivalents<\/a><\/p>\n<p style=\"margin:0 0 12px;\"><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/ti-grade-2\/\">Ti Grade 2 \u2014 chemical composition, mechanical values, standard equivalents<\/a><\/p>\n<p style=\"margin:0;color:#6b7a84;font-size:14px;\">Both grades are supplied to order in round bar, flat bar, plate, sheet, pipe and forged forms. <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/contact\/\">Contact us<\/a> for a quotation.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ti Grade 1 is the softest pure titanium grade; Grade 2 is stronger thanks to its slightly higher oxygen content.<\/p>\n","protected":false},"author":1,"featured_media":3420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-3970","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-comparisons"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is the Difference Between Ti Grade 1 and Ti Grade 2? 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