Bulk self-diffusion of 44Ti was studied in α-phase single crystals, at temperatures ranging from 776 to 1132K, using ion-beam sputtering. The results, for diffusion perpendicular to the c-axis, could be described by:

D (m2/s) = 1.7 x 10-8 exp[-192.8(kJ/mol)/RT]

C.Herzig, R.Willecke, K.Vieregge: Philosophical Magazine A, 1991, 63[5], 949-58