The superplastic behavior of TA32 titanium alloy sheet was investigated by constant strain rate tensile tests at deformation temperature range of 920–980 ℃ and strain rate range of 5×10^–5–1×10^–3 s^–1. The deformation characteristics and microstructure evolution during superplastic bulging of cone shaped part was analyzed. The results show that TA32 alloy provides superior superplastic deformation capability, with a maximum elongation up to 864% at 920 ℃ with the strain rate of 1×10^–3 s^–1. The height of the cones is higher at 940 ℃ and 960 ℃ , 90 mm and 92 mm, respectively, and microstructure has no significant change with different deformation.