It was found that the \(k_{d}\) coefficient in the mixed stage on Cu\({}_{46.2}\) is smaller in its absolute value (\(k_{d}=14.7\cdot 10^{-2}\) | ; Figure 2b) than that for Cu\({}_{1.0}\) (\(k_{d}=15.6\cdot 10^{-2}\) | ; Figure 2b). The same result is correct for steel surfaces (St\({}_{1.0}\) and St\({}_{46.2}\)). This indicates that the rate of the decrease in the contact diameter on the Cu\({}_{46.2}\) surface is less than on the Cu\({}_{1.0}\) surface. An increase in the contact angle by 7-10\({}^{\circ}\) and a drop in the decrease rate of the contact diameter during the transition from CCD to the mixed stage on rough Cu\({}_{12.6}\), Cu\({}_{15.3}\), Cu\({}_{21.8}\), Cu\({}_{25.8}\), Cu\({}_{46.2}\), and St\({}_{46.2}\) surfaces is explained by grooves with a depth and width of more than 1.7 \(\upmu\)m. This is evaluated by the Sz parameter (Tables 1 and 2). It is known that asperities and cavities on the surface are energy barriers that prevent three-phase contact line movement during droplet spreading and evaporation [53]. If the size of these texture elements does not exceed 1.7 \(\upmu\)m (surface Cu\({}_{1.0}\) in Table 1 and surfaces St\({}_{1.0}\), St\({}_{12.6}\), St\({}_{15.3}\), St\({}_{21.8}\), St\({}_{25.8}\) in Table 2), then the three-phase contact line movement during the transition from the CCD to the mixed stage occurs uniformly from all sides (Figure 4). If the size of these irregularities on the surface is greater than 1.7 \(\upmu\)m (Cu\({}_{12.6}\), Cu\({}_{15.3}\), Cu\({}_{21.8}\), Cu\({}_{25.8}\), Cu\({}_{46.2}\) surfaces in Table 1 and St\({}_{46.2}\) in Table 2), then the three-phase contact line moves unevenly during the transition from the CCD to the mixed stage (Figure 5). The line predominantly moves along the grooves formed by the abrasive material on the surface. At the end of evaporation, there is an abrupt contact line movement, which is accompanied by an abrupt increase in the contact angle. It can be seen from Figure 2b that the initial contact diameters decrease in the sequence Cu\({}_{1.0}\)-Cu\({}_{12.6}\)-Cu\({}_{15.3}\)-Cu\({}_{21.8}\)-Cu\({}_{25.8}\)-Cu\({}_{46.2}\). In the same sequence, the roughness on the copper surfaces increases (Table 1) and the wetting properties deteriorate (the contact angle increases) (Figure 2a). In the case of steel surfaces (Figure 3b), the initial contact diameters decrease in the sequence St\({}_{46.2}\)-St\({}_{25.8}\)-St\({}_{21.8}\)-St\({}_{15.3}\)-St\({}_{12.6}\)-St\({}_{1.0}\), the wetting properties deteriorate (Figure 3a), and the roughness decreases (Table 2). Wetting properties and surface roughness are the most significant factors affecting the diameter of the droplet spreading over metal surfaces. The greater the wetting properties and the lower the surface roughness, the larger the spreading diameter. In the case of copper, both factors (wetting properties and roughness) affect the decrease in the spreading diameter in the sequence mentioned above. On steel surfaces, the wetting properties affect the decrease in the spreading diameter, and the roughness affects its growth in the sequence mentioned above. As noted, the initial contact diameter decreases after balancing the forces acting on the droplet in this sequence. It can be concluded that wetting properties are the most significant factor that affects the contact spreading diameter when a texture on copper and steel surfaces is formed by abrasive materials. For this reason, the spreading diameter of a 10 \(\upmu\)L droplet on the St\({}_{46.2}\) surface is 0.6 mm larger compared to that on the St\({}_{1.0}\) surface (\(\Delta d=d(\)St\({}_{46.2})-d(\)St\({}_{1.0})=4.0-3.4=0.6\) mm (Figure 3b)). An increase in the spreading diameter by 0.6 mm on the St\({}_{46.2}\) surface is due to a decrease in the contact angle of 18\({}^{\circ}\) (\(\Delta\theta=\theta(\)St\({}_{1.0})-\theta(\)St\({}_{46.2})=89-71\)=18\({}^{\circ}\)) with an increase in roughness of \(\Delta\)Sz = 1.0 \(\upmu\)m (\(\Delta\)Sz = Sz(St\({}_{46.2})-\)Sz(St\({}_{1.0})=1.7-0.7=1.0\)\(\upmu\)m).