High-temperature tensile tests were performed on TA15 titanium alloy at strain rates of 0.001 s

–1

0.005 s

–1

0.01 s

–1

and temperatures of 880 ℃

900 ℃

920 ℃

940 ℃. The material exhibits excellent superplasticity with elongation exceeding 500% above 920 ℃ and below 0.005 s

–1

. The constitutive equations of TA15 titanium alloy and the strain sensitivity index m and material constant K values at different temperatures with strain rate of 0.005 s

–1

were calculated. Finite element simulations were used to analyze the thickness distribution of the double-layered structural component

and

pressure–time curves were obtained. At the temperature of 920 ℃

the hollow double layer structural parts with local weight reduction are made by using pre-hollow panels SPF/DB

the minimum wall thickness is 0.31 mm

the diffusion area of the component was analyzed by ultrasonic C-scan

and the results showed that the bonding ratio is higher than 95%.