The effects of applied tensile stress on the growth of ellipsoidal ω phase precipitates have been investigated for a Ti−20wt%Mo alloy aged at 300 °C. The application of tensile stress accelerates the growth of ω-precipitates when the misfit strain ε Μ of the precipitates along the loading direction is greater than 0; however, it does not significantly affect the growth of precipitates in cases where ε Μ < 0. Whereas the growth of precipitates under no stress or in the case where ε Μ < 0 under tensile stress is governed by the diffusion of

The influence of applied compressive stress on the growth kinetics of ellipsoidal ω phase precipitates was investigated for a Ti−20wt%Mo alloy aged at 300 °C. The application of compressive stress accelerated the growth of ω-precipitates when the misfit strain ε Μ of the precipitates along the loading direction is smaller than 0, whereas it did not essentially induce the same effect in cases where ε Μ > 0. The growth of the precipitates was interface-controlled in the case where ε Μ < 0 under a compressive stress of 450 − 550 MPa.The interface-controlled growth rate increased linearly with increasing the compressive stress.The interface-controlled growth rate under a compressive stress was slower than that under the same tensile stress in the case ε Μ > 0.