【摘要】 高性能钛合金被广泛应用于航空航天、海洋工程、军事装备和生物医学等领域。其中，双相钛合金因其卓越的综合性能和较好的组织热稳定性，已成为应用最广泛的钛合金。然而，如何实现双相钛合金强度与塑性的协同提升仍是该研究领域的核心挑战。本文从钛合金的化学成分及显微结构出发，系统综述了钛合金化学成分设计方法，阐述了高强韧双相钛合金的研究现状及其强韧化策略：包括，c/a轴比化学成分调控设计，多尺度异质结构设计，纳米马氏体相变设计和增材制造设计，并揭示其强韧化机制。最后，本文展望了未来高强韧双相钛合金设计策略，有望促进高强韧双相钛合金发展。更多还原

【Abstract】 High-performance titanium alloys are widely used in aerospace, marine engineering, military equipment, and biomedicine. Among them, dual-phase titanium alloys are the most extensively utilized due to their excellent combination of mechanical properties and superior microstructural thermal stability. However, achieving a synergistic enhancement of strength and ductility remains a central challenge in this field. This review systematically examines the chemical composition and microstructural design methods of titanium alloys, with a particular focus on dual-phase systems. It elaborates on chemical composition design strategies, summarizes recent advances in strengthening-toughening approaches, including c/a ratio modulation design, multi-scale heterostructure design, nano-martensitic phase transformation design, and additive manufacturing design, and reveals the underlying strengthening-toughening mechanisms. Finally, future directions for the development of high-strength and high-ductility dual-phase titanium alloys are discussed to guide the next generation of alloy design.更多还原