In　this　study,　Cu–10W　and　2　wt%Y2O3/Cu–10W　composites　were　successfully　prepared　via　mechanical　ball　milling　and　spark　plasma　sintering.　Hot　compression　experiments　on　the　two　materials　were　carried　out　in　the　temperature　range　of　300°C-600　°C　and　in　the　strain　rate　range　of　0.01　s−1–10　s−1.　The　hot　deformation　activation　energy　of　the　two　materials　was　calculated　and　a　constitutive　equation　was　established.　The　optimum　hot　deformation　process　parameters　were　obtained　according　to　a　hot　processing　map.　The　effects　of　Y2O3　on　the　thermal　deformation　behavior　of　the　Cu–10W　composites　and　their　microstructures　were　investigated,　and　the　results　showed　that　Y2O3　could　enhance　the　stability　of　Cu–10W　at　high　temperatures.　The　activation　energies　of　thermal　deformation　of　Cu–10W　and　2　wt%Y2O3/Cu–10W　were　159.56　kJ/mol　and　129.85　kJ/mol,　respectively.　Moreover,　Y2O3　improved　the　interfacial　bonding　strength　of　Cu　and　W　in　the　Cu–10W　material,　effectively　preventing　the　generation　of　microcracks　and　pores　during　the　high-temperature　compression　process;　Y2O3　provides　more　nucleation　sites　in　the　recrystallization　process,　which　is　favorable　for　the　excitation　of　recrystallization.　A　low　strain　rate　at　high　temperatures　favors　the　occurrence　of　recrystallization,　and　the　2　wt%Y2O3/Cu–10W　composites　tend　to　exhibit　discontinuous　dynamic　recrystallization　(DDRX)　under　high-Z-value　conditions　and　continuous　dynamic　recrystallization　(CDRX)　under　low-Z-value　conditions.　©　2024