Titanium alloy sheet and eye glasses

Abstract

A titanium alloy sheet includes, as a chemical composition, by mass %: Al: 1.00% to 7.00%; Fe: 0.10% to 1.70%; O: 0.05% to 0.30%; N: 0.000% to 0.080%; C: 0.000% to 0.100%; H: 0.000% to 0.013%; Cu: 0.00% to 2.00%; Si: 0.00% to 0.30%; and a remainder Ti and impurities, wherein a microstructure includes, by an area ratio, 80% or more of an a phase, an average grain size of the α phase is 20.0 μm or less, an area ratio of crystal grains αt-30 in which an angle formed between a c-axis and a thickness direction of the titanium alloy sheet is within 30 degrees in the α phase is 20% to 50%, and an area ratio of crystal grains in which an average value of GOS (grain orientation spread) measured using EBSD (electron backscatter diffraction) is 2.0 or less in the αt-30 is 80% or more.

Dependencies are inferred from the claim text.