Patent ID: 7438849

Claim:
A titanium alloy that is β single phase at room temperature consisting of: when the entirety is taken as 100% by mass, at least one alloying element selected from the group consisting of molybdenum (Mo), vanadium (V), tungsten (W), niobium (Nb), tantalum (Ta), iron (Fe), chromium (Cr), and copper (Cu) in a molybdenum equivalent “Mo eq ” of from 3 to 11% by mass, the molybdenum equivalent determined by the following equation, Mo eq =Mo mass +0.67V mass +0.44W mass +0.28Nb mass +0.22Ta mass +2.9Fe mass +1.6Cr mass +0.77Cu mass , wherein Mo mass , V mass , W mass , Nb mass , Ta mass , Fe mass , Cr mass , and Cu mass are expressed in percentages by mass; an interstitial solution element that is oxygen (O) in an amount of from 0.6 to 3% by mass; and the balance of titanium (Ti); wherein said titanium alloy is produced by a solution treatment comprising: heating a raw titanium alloy material to form a β single phase at a temperature above the α+β/β transformation temperature of the raw titanium alloy material; and quenching the heated raw titanium alloy material to form a titanium alloy that is a β single phase at room temperature; wherein said titanium alloy has a flexibility characterized by a Young's modulus of 70 GPa or less, exhibits a tensile strength of 1,000 MPa or more, and exhibits an elastic deformability of 1.6% or more.