Effect of hot working process on microstructure and properties of BTi-6431S titanium alloy plate

The effects of two hot working processes on microstructure and properties of BTi-6431S high temperature titanium alloy plate were studied.The results show that the microstructure of plate inα+βrolling is similar to equiaxed two-phase working microstructure,and the microstructure inβrolling is typical fine lamellar Widmannstaetten structure. The strengths inβrolling at room temperature and high temperature are obviously higher than those inα+βrolling,while the ductility of plate inβrolling is slightly lower.The plates have higher high-temperature transient strength at 650℃and can be used to make short time structure components at 650℃for aerospace industry.