综述了钛基大块非晶的成分-非晶形成能力的对应关系,总结了已知的钛基大块非晶的一次结晶相及力学性能,并阐述了钛基大块非晶的塑性变形机制,以及造成低塑性的因素和改善塑性的方法,着重介绍了铸造纳米结构钛合金的成分、组织和力学性能.通过精巧的成分设计,结合金属模铸造技术,制备出了直径小于5 mm,并具有微米尺度β-Ti(M)一次树枝晶相+纳米尺度棒状β-Ti/y-TiCu共晶结构的复合组织,其中棒状β-Ti相尺寸在30 nm～300 nm范围;y-TiCu共晶基体相由小于10 nm的晶粒或亚晶粒组成,这种多层次纳米结构的钛合金具有高强度,同时具有明显的延伸性.
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