A titanium alloy sheet metal bracket with wrinkle easily was difficult to form.Based on finite element method

the influence of blank shape and die size on wrinkling defects was analyzed.A new blank with an opening at the gap of the original blank was designed

which was fabricated by inverse finite element approach combined experiment.The die size was set with considering the difference of thermal expansion coefficient between the mold material and the titanium alloy

and the hot forming experiments were carried out at 650、660、670 and 680 ℃

respectively.And the experimental results reveal that the new billet can overcome effectively wrinkling in the forming process

and the forming temperature has great influence on the forming effect of parts.Wrinkling can’t be completely eliminated with low forming temperature

while surface optimization is aggravating and the cost is increased with high forming temperature.The optimum forming temperature is 670 ℃.