The　microstructure　and　crystallographic　texture　have　been　investigated　in　a　Cu-45　at.%Ni　alloy　after　heavy　rolling　and　subsequent　annealing　at　different　temperatures.　Cold-rolling　to　a　von　Mises　strain　of　5.7　produced　a　sample　with　an　average　boundary　spacing　along　the　normal　direction　of　similar　to　70　nm　and　a　large　fraction　of　high-angle　boundaries　(HABs),　similar　to　70　%.　Annealing　of　this　sample　for　1　h　at　temperatures　a　parts　per　thousand　currency　sign450　A　degrees　C　causes　structural　coarsening,　during　which　the　fraction　of　HABs　decreases.　Annealing　at　higher　temperatures　results　in　pronounced　discontinuous　recrystallization　accompanied　by　twinning.　Large　frequencies　of　twin　boundaries　contribute　to　high　HAB　fractions　measured　in　the　as-recrystallized　condition.　Cube-oriented　grains　demonstrate　a　size　advantage　compared　to　grains　of　other　orientations,　thus　creating　a　strong　cube　texture　in　the　recrystallized　material.　Further　annealing　of　the　recrystallized　microstructure　promotes　grain　growth,　which　leads　to　a　significant　strengthening　of　the　cube　texture　and　to　a　dramatic　loss　of　HABs.　After　1　h　of　annealing　at　1000　A　degrees　C　the　fraction　of　the　cube　texture　reaches　99　%　and　the　HAB　fraction　is　12　%.