Titanium alloy’s high strength and heat-resistant characteristics determine its wide application in aerospace， medicine and other fields. However， due to the high difficulty of titanium alloy machining， the traditional processing method causes increased consumption of molds and long manufacturing cycle. As an advanced manufacturing process with low manufacturing cost and high molding efficiency， fusion wire additive manufacturing， with its unique advantage of direct molding， has been attracted the attention of a large number of scholars in the manufacturing of titanium alloys. This paper begins with a literature review， focusing on titanium alloy as the material. we delve into the principles， characteristics， and classification of metal fused wire additive manufacturing technology. Several common fused wire additive manufacturing techniques are described and their application fields， challenges， and future development trends are discussed.