On the calculation of annealing twin density

Gleiter’s atomistic growth accident theory for the formation of annealing twins is reviewed. It is shown that Gleiter’s formulation accurately calculates the annealing twin density in Cu–3 wt.%Al aluminum bronze and pure Cu if no terms are deleted from the complete equation and more recent data are used. Gleiter’s model predicts that twin density depends primarily on the grain size with little dependence on the annealing temperature, in agreement with the suggestions of some other investigators.