It is a process that is used for providing grain size uniformity & composition throughout an-alloy.  This term also describes ferrous alloys. Ferrous alloys are austeniitzed & cooled in the open air. Results of Normalization process is not restricted to peartile, it also produces bainite and martensite that gives stronger and harder steel which is less ductile while having the similar composition as compared to full annealing. In order to give uniformity to the alloy, this is must performed step as it gives refined and improved results.