Wire-feeding laser metal deposition additive manufacturing technology offers significant advantages over other titanium alloy forming processes. Specifically, it enables the production of complex components with high dimensional accuracy and excellent overall performance while addressing the issues of high cost, low material utilization, and inefficiency associated with traditional titanium alloy additive manufacturing techniques. Currently, wire-feeding laser metal deposition technology is transitioning from laboratory research to engineering application. A key development direction involves overcoming existing challenges by establishing an integrated theory that encompasses material, process, structure, and performance design. Researchers worldwide have conducted extensive exploratory work in this field. This review summarizes the fundamental principles and classifications of wire-feeding laser metal deposition technology for titanium alloys. It discusses advancements in the microstructure, properties, and control methods of this technology and outlines future research objectives and developmental trends.