Under high-temperature conditions, differences in thermal expansion coefficients and chemical stability between solid lubricants and substrate materials often lead to poor interfacial adhesion. In this study, a composite coating was fabricated by synergistically combining micro-arc oxidation (MAO) and magnetron sputtering (MS). The defect-rich microporous structure generated by MAO on the TC4 surface was utilized as a carrier for the deposition of solid silver lubricant via MS. The results show that this microporous structure provides stable adsorption sites for silver, promoting its retention. During high-temperature friction, the structure facilitates the formation of a low-shear-strength lubricating film composed of silver particles, which effectively reduces the coefficient of friction and significantly improves the high-temperature wear resistance of TC4.