Based on the high speed cutting theory,a theoretical model of cutting titanium alloy TC4 was established. Also,the finite element simulation analysis as well as orthogonal milling experiments were carried out. The influence of the spindle speed n,feed en-gagement fz,and axial cutting depth ap on cutting force was obtained. The results showed that similar to the conventional cutting situa-tion,the axial cutting depth ap plays the biggest role in affecting the milling force. With the milling force and the material removal rate,the cutting parameters were optimized by the solution set with the material removal rate,and the feasibility of the optimal solution was verified through the milling experiment.
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