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<p>The experimental material used in this study was annealed Ti-6Al-4&#xa0;V alloy. The microstructural evolution, mechanical properties, and recrystallization behavior of Ti-6Al-4&#xa0;V alloy prepared by the combined process of multi-directional isothermal forging (MDIF) and warm rolling (WR) were investigated. The results show that the combined process can significantly improve the ductility of the alloy while maintaining good strength. As the rolling reduction increases, the grain size first increases and then decreases. A well-distributed Ti-6Al-4&#xa0;V alloy is obtained at a reduction of 80%, with grain size being the main factor affecting ductility. At a reduction of 80%, the ductility of the alloy reaches its highest level, with an elongation after fracture of 18.46%, while maintaining tensile strength comparable to that of the original alloy. EBSD analysis indicates that discontinuous dynamic recrystallization (DDRX) is the dominant mechanism during warm rolling, as confirmed by low accumulated misorientation (&lt; 15°). The proportion of recrystallized grains reaches its maximum at a reduction of 60%, and then decreases with further increases in reduction. The combination of multi-directional isothermal forging and warm rolling provides a promising method for improving the strength-ductility balance of Ti-6Al-4&#xa0;V alloy and offers new insights for the manufacturing of high-performance titanium alloys.</p> Graphical Abstract <p></p>

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Preparation of Ti-6Al-4 V Alloy with Excellent Ductility by Combining Multi-Directional Isothermal Forging and Warm Rolling

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • He Wang,
  • Yingxiang Yang,
  • Zhongxue Feng,
  • Kai Wang,
  • Yueyi Wang,
  • Min Chen,
  • Xuyang Liu,
  • Xuefeng Zhang,
  • Xiaoqi Wang,
  • Huarong Qi,
  • Qingnan Shi,
  • Jianhong Yi

摘要

The experimental material used in this study was annealed Ti-6Al-4 V alloy. The microstructural evolution, mechanical properties, and recrystallization behavior of Ti-6Al-4 V alloy prepared by the combined process of multi-directional isothermal forging (MDIF) and warm rolling (WR) were investigated. The results show that the combined process can significantly improve the ductility of the alloy while maintaining good strength. As the rolling reduction increases, the grain size first increases and then decreases. A well-distributed Ti-6Al-4 V alloy is obtained at a reduction of 80%, with grain size being the main factor affecting ductility. At a reduction of 80%, the ductility of the alloy reaches its highest level, with an elongation after fracture of 18.46%, while maintaining tensile strength comparable to that of the original alloy. EBSD analysis indicates that discontinuous dynamic recrystallization (DDRX) is the dominant mechanism during warm rolling, as confirmed by low accumulated misorientation (< 15°). The proportion of recrystallized grains reaches its maximum at a reduction of 60%, and then decreases with further increases in reduction. The combination of multi-directional isothermal forging and warm rolling provides a promising method for improving the strength-ductility balance of Ti-6Al-4 V alloy and offers new insights for the manufacturing of high-performance titanium alloys.

Graphical Abstract