（1．College of Science, China University of Petroleum, Qingdao 266580, China） （2．College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China)
With low density, good room temperature plasticity and superior high temperature performance, Ti2AlNbbased alloy is considered as ideal material instead of Nibased superalloy. Ti2AlNbbased alloy derives from Nbmodified Ti3Albased alloy, and the large amount of Nb element will inevitably affect its own property and weldabity. Now, many studies have focused on the microstructure and mechanical property of Ti2AlNbbased alloy. In order to promote the industrial application, the weldabity of Ti2AlNbbased alloys has attracted more and more attention. Based on the authors results and a large number of literatures, the weldabity of Ti2AlNbbased alloy is summarized, including welding to itself and to other materials, as well as the usual welding methods and the influence of Nb element on its weldabity. The emphasis of the review is joint microstructure, mechanical properties and weld formation mechanism. Finally, the advantages and disadvantages of various welding methods are summarized, and the future work is prospected.