First page of ASTM B 348, covering titanium and its alloys. Brief descriptions of Grades 1 through 37.
https://cdn.fosstodon.org/media_attachments/files/113/113/936/211/282/101/original/0a3b998098af5b2e.jpeg
By the way, those of you who were joking yesterday about Grade 6 titanium need to stretch your imaginations. Try Grade 37.
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