Structure–mechanics relationships in proton irradiated pure titanium

Radiation effects on the mechanical behavior and the microstructure of pure hcp titanium polycrystals have been investigated. Results have been analyzed in the frame of a dispersed obstacle hardening model and compared to those previously obtained for pure metals with a fcc or bcc structure, such as Cu and Pd or Fe, respectively. Differences in the defect accumulation rate and the dose dependence of hardening are discussed in terms of possible irradiation hardening mechanisms for the hcp structure.