Varying contents of carbon, titanium and boron were used in the base steel composition 0.30 wt% Si, 2.0 Mn, 0.006 S, 0.03 Nb, 30–35 ppm N. Hot ductility tests performed with Gleeble-3800, after sample was in-situ melted, solidified, cooled to test temperature. Investigation completed thermodynamic kinetic simulations. The best results obtained for steels containing 58–100 B 35 Ti. They showed v...