采用电化学方法研究了不同热处理条件（沉积态，时效态，时效水冷态）下3D打印钛合金在1 mol/L盐酸溶液中的耐蚀性，同时观察了合金的显微组织。结果表明：3D打印钛合金为细小的针状α+β网篮组织；时效处理后，α相析出且粗化，耐蚀性减弱；水冷处理后，组织转变为特殊的α+β网篮组织，由粗大的片层α相和细小针状α相组成，耐蚀性进一步减弱。在1 mol/L盐酸溶液中，沉积态合金的耐蚀性最强，时效态合金的耐蚀性次之，时效水冷态合金的耐蚀性最差。

Electrochemical method was used to study the corrosion resistance of 3D printed titanium alloy in 1 mol/L hydrochloric acid solution under different heat treatment conditions, and the microstructure of the alloy was also observed. The results show that the structure of the 3D printed titanium alloy was a fine needle-like α + β net basket structure; after aging treatment, α phase precipitated and coarsened, and the corrosion resistance was weakened; after water cooling treatment, the structure of the alloy was transformed into a special α + β net structure,which was composed of coarse lamellar α phase and fine needle-shaped α phase, and the corrosion resistance was further weakened. In the 1 mol/L hydrochloric acid solution, the corrosion resistance of as-deposited alloy was the strongest, the corrosion resistance of ageing alloy was the second, and the corrosion resistance of ageing water-cooled alloy was the worst.