Patent ID: 7670445

Claim:
A titanium alloy, comprising: vanadium, from 10 to 20% by weight; aluminum, from 0.2 to 10% by weight; and a balance essentially titanium, wherein the alloy is plastically deformed in a specific direction, wherein the deformed alloy has a microstructure including a martensite phase, wherein the martensite phase includes an α′ phase and an α″ phase, and diffraction intensities of the deformed alloy by an x-ray diffraction method satisfies any one or more inequalities selected from the group of, ( I α″(002) ⊥ /I α″(111) ⊥ )/( I α″(002) ∥ /I α″(111) ∥ )≦1, and ( I α′(002) ⊥ /I α′(101) ⊥ )/( I α′(002) ∥ /Iα′( 101) ∥ )≦1, where Iα″(002) ⊥ represents a diffraction intensity from a (002) face of the α″ phase in a section perpendicular to the specific direction, Iα″(111) ⊥ represents a diffraction intensity from a (111) face of the α″ phase in a section perpendicular to the specific direction, Iα″(002) ∥ represents a diffraction intensity from a (002) face of the α″ phase in a section parallel to the specific direction, Iα″(111) ∥ represents a diffraction intensity from a (111) face of the α″ phase in a section parallel to the specific direction, Iα′(002) ⊥ represents a diffraction intensity from a (002) face of the α′ phase in a section perpendicular to the specific direction, Iα′(101) ⊥ represents a diffraction intensity from a (101) face of the α′ phase in a section perpendicular to the specific direction, Iα′(002) ∥ represents a diffraction intensity from a (002) face of the α′ phase in a section parallel to the specific direction, and Iα′(101) ∥ represents a diffraction intensity from a (101) face of the α′ phase in a section parallel to the specific direction.