Islem ABBAS / Encadré par Abdallah DIHA2026-07-072026-06-08https://dspace.univ-tebessa.dz/handle/123456789/341This work investigates the influence of heat treatment on the recovery and recrystallisation behaviour of cold-drawn commercially pure aluminum wires, manufactured by the national cable enterprise EN.I.CA.B, Biskra. The wires were cold-drawn from an initial machine wire diameter of 9.5 mm to three final diameters: 5.92 mm, 4.24 mm, and 3.33 mm, corresponding to area reduction ratios of 61.17%, 80.08%, and 87.72%, respectively. Two annealing treatments were applied: a recovery annealing at 160°C for 90 minutes, and a recrystallisation annealing at 290°C for 60 minutes. The characterization techniques employed include tensile testing, Vickers microhardness measurements, and optical microscopy. The results indicate that recovery annealing induces a slight decrease in hardness through dislocation rearrangement and partial annihilation, without altering the grain structure. Recrystallisation annealing, on the other hand, leads to a significant reduction in mechanical strength and the formation of new strain-free equiaxed grains, resulting in a marked improvement in ductility.enAluminumcold drawingrecoveryrecrystallisationheat treatmentdislocations.Thesis