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<p>Superplasticity in the Ti-6Al-4V alloy is a key enabler for efficient forming of complex components in high-performance applications. Previous review articles on Ti-6Al-4V superplasticity have mainly focused on severe plastic deformation (SPD) routes, deformation mechanisms, or selected constitutive models as separate topics, while conventional thermomechanical processing (TMP) is often treated only briefly. Consequently, the relationships between processing routes, microstructural evolution, deformation mechanisms, and constitutive descriptions remain insufficiently integrated. This review addresses this gap by providing a comparative interpretation of TMP, SPD, and non-conventional processing routes and linking processing history directly to superplastic deformation mechanisms and constitutive modeling approaches. In addition, key factors influencing superplasticity including deformation temperature, strain rate, strain-rate sensitivity, microstructural characteristics, and elements additions are discussed in relation to their effects on superplastic flow behavior. Consequently, ultrafine-grained (UFG) Ti-6Al-4V alloy capable of exhibiting superplasticity at lower temperatures and higher strain rates are identified as a promising direction for extending the practical superplastic processing window.</p>

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Superplasticity of Ti-6Al-4V alloy: A review

  • 期刊论文

  • 发表日期：

    2026年6月3日

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  • Yousef Mohammed Al Badawi,
  • Intan Fadhlina Mohamed,
  • Mohd Zaidi Omar

摘要

Superplasticity in the Ti-6Al-4V alloy is a key enabler for efficient forming of complex components in high-performance applications. Previous review articles on Ti-6Al-4V superplasticity have mainly focused on severe plastic deformation (SPD) routes, deformation mechanisms, or selected constitutive models as separate topics, while conventional thermomechanical processing (TMP) is often treated only briefly. Consequently, the relationships between processing routes, microstructural evolution, deformation mechanisms, and constitutive descriptions remain insufficiently integrated. This review addresses this gap by providing a comparative interpretation of TMP, SPD, and non-conventional processing routes and linking processing history directly to superplastic deformation mechanisms and constitutive modeling approaches. In addition, key factors influencing superplasticity including deformation temperature, strain rate, strain-rate sensitivity, microstructural characteristics, and elements additions are discussed in relation to their effects on superplastic flow behavior. Consequently, ultrafine-grained (UFG) Ti-6Al-4V alloy capable of exhibiting superplasticity at lower temperatures and higher strain rates are identified as a promising direction for extending the practical superplastic processing window.