Abstract

We report here, interrelation between orientation dependent spheroidization [1] and bulk texture evolution during static annealing of warm-rolled Ti-6Al-4V alloy. Weakening of basal fibre (ND║〈0001〉) and complementary strengthening of prism fibre (RD║〈101¯0〉) occur on annealing, which is unique and contrary to previous reports. Texture transition is conjugated with two counteracting processes, both being α-colony orientation dependent: spheroidization of αp-phase increasing spread of the fibres, and variant selection during αp → β → αs transformation strengthening only the prism fibre. Basal fibre weakens from orientation dependent spheroidization on annealing, while prism fibre intensity is maintained or increased from αs-variant selection depending on annealing durations.

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