Evolution of microstructure and texture during annealing of two high strength interstitial free steels containing Nb and or Ti

Interstitial free steel containing Nb, recrystallised at a slower rate compared to Ti stabilised steel. The coincidence site lattice boundaries of the type Sigma 3, Sigma 13b and Sigma 39a appear to play a major role during the first stage of grain growth in both the Nb + Ti and Ti containing interstitial free steels. They do not seem to have any major role in the development of final texture in these materials. The distribution of grain boundary misorientation angles also changes with annealing time and show two maxima close to the misorientation angles 60 degrees and 20-40 degrees.