β凝固 γ-TiAl 合金兼具低密度与优良的中高温力学性能，是航空发动机低压涡轮叶片的重要候选材料。 其通过β相凝固可改善高温加工性，但室温塑性不足、传统铸锻工艺成形受限，制约了复杂构件的工程应用。 增材制造为β凝固 γ-TiAl 合金的近净成形与组织调控提供了新的技术路径。 本文采用文献综述与对比分析方法，系统总结了激光粉末床熔融(L-PBF)、激光定向能量沉积(L-DED)和电子束粉末床熔融(EB-PBF)制备 β 凝固 γ-TiAl 合金的研究进展。 激光增材制造具有成形精度高、组织细化显著的优势，但面临裂纹敏感性和残余应力大的挑战；EB-PBF 可以通过工艺参数优化和高预热条件有效抑制裂纹，获得室温抗拉强度超过 800 MPa、伸长率达 2%~3%的综合性能，但存在铝元素挥发和组织粗化问题。 本文重点评述了工艺参数、热处理与后处理对相组成、层片组织及力学性能的影响机理，并展望了合金设计、过程调控与多尺度表征的发展方向。

β-solidifying γ-TiAl alloys combine low-density and excellent mechanical properties at intermediate and high temperatures, making them promising candidates for low-pressure turbine blades in aeroengines. Solidification through the β phase improves hot workability; however, the limited room-temperature ductility and poor formability of conventional casting and forging routes restrict the engineering application of complex components. Additive manufacturing offers a new technological pathway for near-net-shaped fabrication and microstructural control of β-solidifying γ-TiAl alloys. In this review, a comprehensive literature survey and comparative analysis are employed to systematically summarize recent progress in the fabrication of β-solidifying γ-TiAl alloys by laser powder bed fusion (L-PBF), laser-directed energy deposition (L-DED), and electron beam powder bed fusion (EB-PBF). The results indicate that laser-based additive manufacturing provides high geometric accuracy and significant microstructural refinement but suffers from strong crack susceptibility and high residual stresses. Under appropriate process parameters and high preheating conditions, EB-PBF can effectively reduce the cracking tendency, achieving a combination of room-temperature tensile strength exceeding 800 MPa and elongation reaching 2%~3%. However, issues such as aluminium element volatilization and microstructural coarsening remain. This paper focuses on the effects of processing parameters, thermal management, and postprocessing on the phase constitution, lamellar microstructures, and mechanical properties and further outlines future perspectives in alloy design, process optimization, and multiscale characterization.