Abstract: Titanium and its alloys are widely used in various fields because of their advantages such as low density, high specific strength and good biocompatibility. In this paper, the ultrasonic assisted incremental forming process was applied to the TA1 incremental forming process of titanium alloy plate, using ABAQUS finite element software simulation of ultrasonic assisted incremental forming process. And the reason of the forming force reducing in the forming process was analyzed, the influence of different vibration parameters and process parameters on forming force of TA1 titanium alloy sheet was studied. The results show that ultrasonic vibration can significantly reduce the forming force, which provides relevant basis for the application of ultrasonic vibration in the increment forming of TA1 titanium alloy sheet. It is of great significance to expand the application of titanium alloy sheet increment forming process.