Linear friction welding (LFW) is a relatively new type of solidstate welding method emerged in the 1980s, and it is mainly used for the welding of similar and dissimilar noncircular crosssection metals. At present, LFW has been successfully used in the titanium alloy blisks of aircraft engines in the developed western countries. Although the blisk simulators have been welded successfully, the basic theory research is still inadequate. According to the open literatures, most works have been carried out on LFW of similar and dissimilar metals in terms of the microstructure, mechanical properties, process parameters and numerical simulation. Besides, the correlated characters between the microstructure and mechanical properties have been found. This article reviewed the important research results on LFW titanium alloys, and the deficiencies at present have been put forward. Finally, the application statuses and development prospects of LFW titanium alloys have been considered.