Abstract. The simulation of a single pass of equal-channel angular pressing (ECAP) was conducted in the QFORM program. The strain distribution in the longitudinal and transverse sections of a Zr1.0%Nb alloy billet was calculated. This distribution was investigated at various moments $(t_i, i = 1, 2, 3, 4)$ during the shearing deformation in the intersection channels (deformation zone).

Key words: zirconium alloy, ECAP, mathematical modeling.