TITANIUM ALLOY THIN PLATE, AND METHOD FOR PRODUCING TITANIUM ALLOY THIN PLATE

A titanium alloy thin sheet according to the present disclosure contains specific chemical components, in which, when a crystal orientation of an α-phase is expressed by an Euler angle g={ϕ1,Φ,ϕ2} according to Bunge's notation method, the orientation with maximum intensity expressed by a crystal orientation distribution function f(g) calculated with Series Rank of 16 and a Gaussian half width of 5° in texture analysis using a spherical harmonics method of an electron backscatter diffraction method is in the range of ϕ1: 0 to 30°, Φ: 60 to 90°, and ϕ2: 0 to 60°, and a degree of accumulation of the orientation with maximum intensity is 10.0 or more, a 0.2% proof stress in a sheet width direction at 25°C is 800 MPa or more, a Young's modulus in the sheet width direction is 125 GPa or more, and an average sheet thickness is 2.5 mm or less.