At metallurgical plants, transformer steel is produced mainly by double or triple rolling. One-time rolling can be used to simplify the technology of steel production. The electromagnetic properties of the finished transformer steel sheet depend on the structure after primary recrystallization. However, the technology of such a process requires experimental research. Therefore, there is a need to investigate the effect of matrix stabilization after a single rolling of slabs with previous slacking of slabs on the formation of rib texture. Samples of transformer steel from slabs that did not undergo homogenization and those that are subjected to homogenization annealing are studied. Analysis of the microstructure of cold-deformed samples after primary recrystallization shows that homogenizing annealing promotes the formation of a more homogeneous and fine-grained structure of steel. Samples that have been rolled once have a smaller grain size than after two and three rolls. According to research, it is possible to recommend a single rolling to obtain a finished sheet of transformer steel.