Abstract: Abstract: In response to the low plasticity problem of TC4 alloy formed by Metal Powder Injection Molding Technology (MIM), this study investigates the preparation of TC4 alloy samples using MIM technology and discusses the changes in plastic microstructure under different dual heat treatment processes, in order to improve the comprehensive mechanical properties of MIMTC4 alloy. As a result, it was found that after treatment with process 2, the MIMTC4 alloy had a higher number of toughness dimples in the cross-section. Under the same field of view, the toughness dimples had larger diameters and depths, and the average toughness dimple size was the largest compared to other groups of processes, at 11.8 μ m. The proportion of dimples with a size in the range of 6-14 μ m is 74%. The hardness value and melt index of the heat-treated alloy sample are the highest, reaching 539.76HV and 1893.06g/10min, respectively. At the same time, the yield strength and tensile strength of MIMTC4 alloy did not change significantly after process 2 heat treatment, while the plasticity increased by 13.75%. The results indicate that heat treatment process 2 can improve the comprehensive mechanical properties of TC4 titanium alloy, enhance its industrial production and practical application scope.