[en] Small additions of Ti (up to 0.54%) in the presence of C (approximately 0.12%) negligibly influence the temperature of the recrystallization initiation of molybdenum molten in an arc furnace and they slightly delay the recrystallized grain growth. Coarse carbide precipitations (Mo₂C mainly) are distributed nonuniformly across the slabs sections, which spoils their deformability and causes the cracks initiation during forging. Small additions of Zr (up to 0.74%), in variance with Ti additions, substantially increase the recrystallization initiation temperature of molybdenum (up to 1600 deg C) and more effictively delay the recrystallized grain growth. Due to carbide disperse precipitations (ZrC and Mo₂C) the alloys of the Mo-Zr-C system are more workable during hot forging in comparison with the Mo-Zr alloys. A simultaneous addition of Ti and Zr into molybdenum permits to produce alloys of a satisfactory deformability, however their recrystallization initiation temperature is lower than that of Mo-Zr-C alloys and they are characterized by the same intensive growth of recrystallized grain