<p>The effect of 0.2 wt.% Ti modification on the microstructure, Brinell hardness and mechanical properties under static tension of ZG35 steel is studied. The morphological characteristics of the matrix phase and carbide were studied using an optical microscope. To determine the solubility of carbon in the solid solution by the degree of ferrite lattice distortion, the change in the ferrite lattice constant was measured by the XRD method. The grain size, dislocation density and the nature of their distribution in the matrix were determined by the EBSD method. It was found that effects of Ti on the structure and mechanical properties of cast ZG35 steel are complex, involving three adverse and one beneficial influence. At the same time, the strengthening effect of carbide was not revealed. The mechanism of titanium modification of cast steel is that the resulting TiC promotes grain refinement, increases the dislocation density in the microstructure and improves the deformation resistance of the matrix. This leads to an increase in the strength and hardness of the steel.</p>