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<p>To fully exploit the aging strengthening effect of metastable β-titanium alloys, a multi-component Ti-VMoCrZrAl alloy was designed by setting the adjusted molybdenum equivalent to the critical value of 10. The alloy underwent solution treatment followed by cold rolling and recrystallization annealing after rolling. The annealed alloy exhibited fine grain sizes and a heterogeneous grain structure, as revealed by EBSD characterization. The solution-treated alloy demonstrated excellent strength–ductility matching, with a yield strength of 1044&#xa0;MPa and an elongation of 23.5% after cold rolling and annealing. Upon aging treatment, a large number of fine <i>α</i>-phase precipitates were observed in the alloy microstructure. After 500&#xa0;°C/24&#xa0;h aging, the alloy achieved the optimal strength–ductility balance, with a yield strength of 1510&#xa0;MPa and an elongation of 7.6%.</p>

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A Multi-Component Titanium Alloy with Critical Molybdenum Equivalent Exhibiting Superior Strength–Ductility Synergy

  • 期刊论文

  • 发表日期：

    2026年2月22日

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  • Xinguang Zhao,
  • Bing Zhong,
  • Quan Gu

摘要

To fully exploit the aging strengthening effect of metastable β-titanium alloys, a multi-component Ti-VMoCrZrAl alloy was designed by setting the adjusted molybdenum equivalent to the critical value of 10. The alloy underwent solution treatment followed by cold rolling and recrystallization annealing after rolling. The annealed alloy exhibited fine grain sizes and a heterogeneous grain structure, as revealed by EBSD characterization. The solution-treated alloy demonstrated excellent strength–ductility matching, with a yield strength of 1044 MPa and an elongation of 23.5% after cold rolling and annealing. Upon aging treatment, a large number of fine α-phase precipitates were observed in the alloy microstructure. After 500 °C/24 h aging, the alloy achieved the optimal strength–ductility balance, with a yield strength of 1510 MPa and an elongation of 7.6%.