Titanium matrix fiber-reinforced plastic composites had attracted increasing interest in marine and other fields because of their excellent mechanical and corrosion resistance. However, the interfacial bonding strength between the titanium matrix and the plastic is an important factor limiting its wide application. In this paper, the surface of titanium alloy TC4 (Ti-6Al-4V) was anodized to form an oxide layer with a 1–2 μm crack structure on the surface of titanium alloy. Then the titanium alloy was combined with plastic polyphenylene sulfide (PPS) by direct injection molding. The results show that different oxide layer structures on the surface of titanium alloy, which can be obtained by different anodizing times and anodizing temperatures, can obtain TC4-PPS composites with different bond strengths. The maximum bond strength of TC4-PPS composites was 16.8 MPa when the anodizing temperature was 90 °C and the oxidation time was 30 min. We also discussed the effect of titanium alloy oxide layer surface morphology, wettability, roughness, composition, failure mode, and glass fiber on the bonding strength, which is important for expanding the application of titanium alloy and plastic composite.

钛基纤维增强塑料复合材料因其优异的机械性能和耐腐蚀性能在海洋和其他领域引起了越来越多的关注。然而，钛基体与塑料之间的界面结合强度是限制其广泛应用的重要因素。本文对钛合金TC4（Ti-6Al-4V）表面进行阳极氧化处理，在钛合金表面形成具有1~2 μm裂纹结构的氧化层。然后通过直接注射成型将钛合金与塑料聚苯硫醚（PPS）结合。结果表明，钛合金表面不同的氧化层结构，通过不同的阳极氧化时间和阳极氧化温度，可以获得不同结合强度的TC4-PPS复合材料。当阳极氧化温度为 90 ℃、氧化时间为 30 min 时，TC4-PPS 复合材料的最大结合强度为 16.8 MPa。我们还讨论了钛合金氧化层表面形貌、润湿性、粗糙度、成分、失效模式和玻璃纤维对结合强度的影响，这对于扩大钛合金和塑料复合材料的应用具有重要意义。