1. The plasticity of bismuth (99.999% Bi) at low temperatures (to 0\dgC or 0.5Tm,oK) is equal to zero and then increases sharply, particularly in upsetting, and reaches a peak at 50\2-100\dgC (0.6\2-0.7Tm,oK), particularly a lower strain rates. With further increase of the temperature the plasticity again decreases. 2. The temperature-rate dependence of the resistance to deformation can be divided into low-temperature ( t1) branches; evidently temperature t1 is the initial recrystallization temperature-it increases with the strain rate. 3. The plasticity and resistance to deformation of bismuth are sensitive to changes in the strain rate. 4. With t\s>t1 the temperature-rate dependence of the resistance to deformation has a monotonic character and is more evident at higher degrees of strain.