Abstract
It has been shown that when a refined dispersion of rare earth oxides, initially formed in α-Ti, is annealed above the α/β transus the average particle diameter coarsens from ≈50nm to ≈ 0.5μm. This enhanced degree of coarsening when compared with annealing below the transus cannot be rationalized simply on the basis of an increased diffusivity of Er in the β phase. Rather, it is concluded that Ostwald Ripening is effected mainly enhanced diffusion along the migrating interphase boundaries during the transformation of α- to βTi.
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