Abstract:Titanium matrix composites (TMCs) have emerged as promising candidates for lightweight, high-strength structural components. Their appeal lies in the potential to surpass the performance limits of conventional homogeneous alloys through strategic design of reinforcements in terms of their type, morphology, and spatial distribution. Concurrently, wire arc additive manufacturing (WAAM) offers a novel paradigm for fabricating complex TMC structures with high material utilization and shortened processing routes, leveraging its dual advantages of near-net shaping and rapid solidification. This review systematically summarizes the current state of research on wire arc additively manufactured TMCs, with a focused discussion on three critical aspects: geometrical integrity, microstructural characteristics, and mechanical properties. The analysis indicates that by optimizing process parameters such as heat input and current mode, and employing auxiliary processes including preheating and maintaining temperature. can effectively mitigate defects such as porosity and cracking, thereby improving dimensional accuracy. The inherent rapid solidification of WAAM, combined with the introduction of reinforcing phases, facilitates grain refinement and enables microstructural control. Furthermore, the strategic design of architectural features such as laminated or network-like structures can lead to significant enhancement in material strength. Future research should focus on a deeper integration of process-microstructure-property relationships to accelerate the broad adoption of this technology in the manufacturing of high-performance components.