Effect of microstructure on tensile properties of near-alpha TA15 titanium alloy

The effect of microstructure on the room and high temperature tensile properties of near-alpha TA15 titanium alloy was studied. The results show that the tensile strength of equiax microstructure is higher than duplex microstructure below 300 °C, but it is conversed above 300 °C. The increase of primary a phase content can reduce the high temperature tensile strength at 500 °C. The thickening of secondary a lamellae can reduce the room and high temperature tensile strength. The strengthening of α phase directional can significantly reduce the high temperature tensile strength at 500 °C, especially secondary α lamellae.