Microstructure and mechanical properties of commercial-purity titanium after rapid (induction) heat treatment

Microstructure changes in commercial-purity titanium (CP-Ti) during local rapid (induction) heat treatment (LRHT) and their influence on tensile and fatigue properties were investigated. It was found that some regimes of LRHT increase the tensile strength by ∼40 MPa and the fatigue limit by ∼1.5 times. It was concluded that the improvement in mechanical properties is associated with the formation of substructure, martensite, and residual stresses during LRHT.