近年来，随着自由锻造装备大型化的不断发展，航空航天关键结构件用锻件的大型化需求急剧增长，大规格棒材的制备成为了科研及工业化生产的重点工作。 TC18 钛合金作为一类高合金化、热变形参数敏感型高强高韧钛合 金，已逐步成为航空航天关键装备的核心结构材料，因此，其棒材的大型化成为了近年来研究及生产的重点方向。 本文梳理了近年来 TC18 钛合金大规格棒材(φ300~φ500 mm)生产技术概况，综述了 TC18 钛合金热变形数值模拟的相关研 究，分析铸锭熔炼、锻造成型及热处理工艺的现状，总结大规格棒材现存问题及解决方法。 最后，展望原材料制备过程今 后一段时间的研究重点，结合使用单位对 TC18 钛合金棒材的使用需求，力争在未来打通原材料和成品锻件的全流程制造工艺，实现工艺个性化设计、组织性能定量调控。

In recent years, with the continuous development of large-scale free forging equipment, the demand for large-scale forgings for aerospace key structural parts has increased sharply, and the preparation of large bars has become the focus of scientific research and industrial production. TC18 titanium alloy, a type of high-strength and high-toughness titanium alloy with high alloying and thermal deformation parameter sensitivity, has gradually become the core structural material of key aerospace equipment. Therefore, large-scale bars have become a key area of research and production in recent years. In this paper, the methods used to produce large TC18 titanium alloy bars (φ300~φ500 mm) in recent years are discussed, the related research on the numerical simulation of the thermal deformation of TC18 titanium alloy is summarized, the current situation of ingot melting, forging and heat treatment technology is analysed, and the existing problems and solutions for large bars are summarized. Finally, considering the future research focus of the raw material preparation process, combined with the demand of users for TC18 titanium alloy bars, we will strive to open up the whole process of manufacturing raw materials and finished forgings in the future and realize personalized design of processes and quantitative control of microstructure and properties.