Single-crystal　Ni-based　superalloys　are　currently　the　material　of　choice　for　turbine　blade　applications,　especially　with　the　emerging　additive　manufacturing　(AM)　that　facilitates　the　manufacture/repair　of　these　single　crystals.　This　promising　AM　route,　however,　comes　with　a　dilemma:　in　the　fusion　and　heat　affected　zones　after　e-beam　or　laser　induced　melting,　one　needs　a　solutionizing　annealing　to　relieve　the　residual　stresses　and　homogenize　the　chemical/microstructure.　The　super-solvus　solutionizing　temperature　is　usually　adopted　from　the　protocol　for　the　cast　superalloys,　which　almost　always　causes　recrystallization　and　stray　grain　growth,　resulting　in　a　polycrystalline　microstructure　and　degrading　the　high-temperature　mechanical　performance.　Here　we　demonstrate　a　custom-designed　post-printing　heat　treatment　to　replace　the　conventional　super-solvus　one.　The　recovery　and　relatively　low　temperature　diminish　the　driving　force　for　recrystallization　and　the　movement　of　stray　grain　boundaries,　without　suffocating　the　chemical/microstructural　homogenization　thanks　to　the　narrow　dendrite　width　and　short　element　segregation　distance.　The　optimal　duration　of　the　heat　treatment　is　proposed　to　achieve　atomic-diffusion　mediated　chemical　homogenization　while　limiting　γ′-particle　coarsening　in　the　interdendritic　regions.　Our　strategy　makes　it　practically　feasible　to　resolve　several　bottleneck　problems　with　one　processing/treatment,　removing　a　seemingly　formidable　obstacle　to　effective　additive　manufacturing　of　superalloy　single　crystal　products.　©　2022　The　Authors