<p>To investigate the effects of surface grinding with different tools on the surface integrity and tensile–tensile high-cycle fatigue properties of DD9 alloy at 760&#xa0;°C, grinding heads, sand belts, and grinding wheels were employed to remove material from specimens of DD9 alloy after standard heat treatment, aiming to provide technical support for its engineering application. The three-dimensional surface topography, hardness, and microstructure after thermal exposure of different specimens were analyzed. Subsequently, the 760&#xa0;°C tensile–tensile high-cycle fatigue properties of sand belt ground specimens with 0.05&#xa0;mm removal were tested. A scanning electron microscope (SEM) was used to observe the fracture surfaces, and a transmission electron microscope (TEM) was employed to examine the dislocation morphology near the fractures. The results revealed that surface grinding with all three tools degraded the surface integrity of the specimens. The surface topographies varied depending on the tools used: Discontinuous pits were observed after grinding with grinding head, while continuous and regular furrows were observed after grinding with the sand belt and the grinding wheel. Among the three tools, wheel grinding resulted in the highest roughness, hardness, and cellular recrystallization depth of the specimens after thermal exposure. Notably, the fatigue strength of sand belt ground specimens was comparable to that of untreated specimens. Furthermore, the dislocation distribution near the fractures was closely related to stress amplitude: Under low stress amplitudes, dislocations were mainly concentrated in the <i>γ</i> phase channels; under high stress amplitudes, dislocations were observed shearing the <i>γ</i>′ phase. This study provides key insights into the rational selection of grinding tools for DD9 alloy, which is of great significance for improving the surface quality and fatigue reliability of DD9 alloy components in high-temperature service environments.</p>