Mathematical models have been developed to describe the recrystallization behaviour of commercial steels during thermomechanical processing operations. From these models it is possible to separate the relative contributions of solute drag and strain induced precipitation on the recrystallization behaviour under both laboratory and industrial processing conditions. The models developed include both static and metadynamic recrystallization, and strain induced precipitation. These models can be used to infer microstructural events that occur under industrial processing conditions which cannot be reproduced in the laboratory.