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The precision forging process of TC4 titanium alloy blade was simulated by software Simufact.Forming, and the distributions of equivalent stress field, equivalent strain field and temperature field after blade forming were analyzed. Then, the influences of different process parameters such as billet temperature, mold temperature, upper mold speed and friction coefficient on the metal flow of blade surface were studied. The results show that the equivalent stress in the burr area around the blade is smaller, the equivalent strain is greater, and the temperature is higher. Then, the maximum equivalent stress point is easy to appear in the head of blade body near the blade tip, the joint of tenon and blade body and the head and tail areas of tenon. However, the equivalent strain and the temperature in the tenon region are the lowest, and the equivalent strain and the temperature in the middle region of blade body are higher. Furthermore, the velocities along the Z direction in each area of the blade are consistent, while the velocities along the X and Y directions in the area between the blade tip and the middle of blade body change in both forward and reverse directions to cause folding defects easily. In addition, the velocity of metal flow in the tenon area of blade is less affected by the process parameters, its flow velocity is relatively slow to close to zero, and the velocity of metal flow near the joint of blade body and tenon is greatly affected by the process parameters. Thus, the velocity of metal flow increases with the increasing of billet temperature, upper mold speed and friction coefficient, and the increase of mold temperature leads to the decrease of the velocity of metal flow.
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