The main aim of the project is to study the interaction between precipitation and recrystallization on all types of micro-alloyed steels. Special attention will be given to low carbon HSLA steels slab cast for strip rolling. The knowledge acquired will be extended to medium carbon micro-alloyed grades bloom or billet cast to be rolled into long products and used for drop forging of automotive components. Special care will be given to the determination of the not yet well-known re-crystallisation-precipitation-time-temperature (RPTT) diagrams by different research techniques as hot torsion, hot tension, hot compression and deformation dilatometry.