| Abstract Scope |
Titanium (Ti) alloys with colony microstructures, including many near-α and α + β Ti alloys, are widely used in aerospace components. Although the characteristics of the colony unit have been extensively studied, the localized deformation behavior of individual colonies has been less reported. This study investigates the slip behavior of α colonies in a near-α Ti alloy (Ti-6.5Al-2Mo-Zr-V) by surface slip trace analysis, revealing two distinct types of slip behaviors: (i) The homogeneous planar slips, which are characterized by dense, uniform, and straight slip lines; (ii) The heterogeneous slips, which involve a combination of wavy and straight slip traces with various intensities and secondary slips. These distinct slip behaviors are governed by the elastic and plastic anisotropies of α colonies and their deformation incompatibility. These findings offer valuable insights into deformation heterogeneity and its effect on their mechanical behavior in colony-structured titanium alloys. |