表面着色技术能在材料表面形成不同颜色的保护性膜层，在提高材料表面性能的同时，又可赋予产品漂亮的外观或实现消光等目的。表面着色有两种形式：一是，所生成的化合物自身具有一定的颜色；二是，光线的反射、折射、干涉等效应而使表面呈现不同颜色。作为两类重要的结构材料，镁合金和钛合金因其各自优良的性质被应用于诸多领域。综述了镁合金和钛合金表面着色工艺研究进展，介绍了镁合金和钛合金表面着色工艺研究及应用现状。镁合金表面着色工艺包括：化学转化+喷涂、金属涂层、有机涂层、阳极氧化和微弧氧化；钛合金表面着色工艺包括：热氧化、化学氧化、阳极氧化和微弧氧化。列举了应用于镁合金和钛合金表面着色的具体工艺参数，总结了两种合金表面着色的具体应用。镁合金和钛合金部件经表面着色处理后，可以兼顾轻量化和强度要求，并实现部件外观的装饰性。基于镁合金和钛合金表面着色工艺研究的现有成果，对镁合金和钛合金表面着色的研究提出了一定展望。

Surface coloring technology can generate protective layers in various colors on the surface of materials. The technology can endow products with attractive appearance or realize extinction while improving surface properties. Surface coloring lies in two forms: on one hand, generated compounds are in certain color; on the other hand, effects of light reflection, refraction and interference enable the surface to exhibit different colors. As two important structural materials, magnesium alloy and titanium alloy have been extensively applied in many fields due to their excellent properties. Research progress on surface coloring processes for magnesium alloy and titanium alloy were summarized, and certain studies on and application status of surface coloring processes for magnesium alloy and titanium alloy were introduced. Surface coloring processes including chemical conversion + spraying, metallic coating, organic coating, anodic oxidation and micro arc oxidation were applied to magnesium alloys; and such coloring processes including thermal oxidation, chemical oxidation, anodic oxidation and micro arc oxidation were applied to titanium alloys. Specific process parameters of surface coloring on magnesium alloy and titanium alloy were listed. Practical applications of surface coloring on the two above-mentioned alloys were summarized. Surface coloring on magnesium alloys and titanium alloys can not only meet the requirements for light weight and strength, but also give a decorative appearance of components. Prospect of studies on surface coloring on magnesium alloys and titanium alloy is also put forward based upon existing study results of surface coloring processes.