This problem is analyzed from two aspects: 1. If the product precision requirements are high, choose titanium plating with a surface hardness of 1800-2100HV; 2. The product precision requirements are not too high, such as drawing dies, flanging Although the size of the mold has changed a little after TD, it is within the allowable change, but the anti-napping ability far exceeds the effect after titanium plating. The surface hardness after TD is 2800-3200HV. (Chengdu Jinpin Technology TD processing, Mr. Chen 13699467249)