α+β type titanium alloy and production method therefor

Abstract

The present invention provides an α+β type titanium alloy and a production method therefor, which has an ultrafine structure causing superplasticity under low temperatures and has a high deformation ratio compared to conventional α+β type Ti alloys. The alloy has an ultrafine structure made of equiaxial crystals in which an area ratio of crystals having a grain diameter of 1 μm or less is 60% or more, and maximum frequency grain diameter is 0.5 μm or less, wherein a portion in which the integration degree of plane orientation of the hexagonal close-packed crystal is 1.00 or more exists within a range of 0 to 60 degrees with respect to a normal line of a processed surface of the alloy.

Dependencies are inferred from the claim text.