Abstract:Titanium and titanium alloys, owing to their low density, high specific strength, and excellent corrosion resistance, are widely used in aerospace and marine engineering. The development of additive manufacturing has enabled new approaches for fabricating complex titanium and titanium alloy components. As a solid-state additive manufacturing technique, cold spray has attracted considerable attention for its advantages of low deposition temperature, high spraying velocity, and minimal thermal effects. The current research status of cold spray additive manufacturing of titanium and titanium alloy coating was reviewed. The characteristics of feedstock powders and their influence on deposition behavior were introduced. The microstructure and properties of cold-sprayed deposits were analyzed, and the mechanisms and effects of strengthening strategies such as in-situ reinforcement and post-processing were summarized, providing a reference for process improvement and application expansion.