(1. Research Center of High-Temperature Alloy Precision Forming，Shanghai University of Engineering Science， Shanghai 201620，China) (2. School of Materials Engineering，Shanghai University of Engineering Science，Shanghai 201620，China)
Ti2AlNb based alloy has a combination of advantages, including high specific strength, low elastic modulus and coefficient of thermal expansion, excellent creep resistance and high temperature oxidation resistance, which has a very broad application prospect in the aerospace field and is expected to partially replace nickel based superalloy in the preparation of aeroengine high temperature structural parts, in order to greatly reduce the engine weight and significantly improve the thrust weight ratio of the engine. However, Ti2AlNb based alloy has poor processing performance and the traditional forming processes for preparing Ti2AlNb based alloy parts face a series of problems such as low efficiency and high cost, which significantly limits their engineering applications. In recent years, additive manufacturing technology has great advantages and potential in the preparation of titanium aluminum alloys owning to its high efficiency, low cost，net-shape forming and other merits, which is expected to overcome the processing difficulties and significantly improve the mechanical properties of Ti2AlNb based alloy. In this paper, the basic characteristics of Ti2AlNb based alloy and the research progress of parts fabricated by additive manufacturing technology are reviewed. The existing problems and shortcomings of Ti2AlNb based alloy additive manufacturing are pointed out. Finally, the future development trend and application prospect of Ti2AlNb based alloy additive manufacturing are prospected.