In this study, machinability tests were executed. AA2024 aluminum alloy that are used in field of automotive and aero industries widely was preferred material in the experimental works. Effects of aging methods that were applied to AA2024 aluminum alloy on machinability were investigated. Test specimens obtained from T3 and T6 that are used methods for aging of AA20024 aluminum alloy, were machined with various cutting parameters (V: 150 m/min, 200 m/min, 250 m/min; F: 0.1 mm/tooth, 0.2 mm/tooth, 0.4 mm/tooth). The test specimens were machined on a CNC milling machine by using the L18 mixed model of Taguchi. Cutting forces (Fx, Fy, Fz) and surface roughness (Ra) were measured. Analysis of Taguchi and ANOVA were done for the results of test. The results showed that main effect factors of the cutting forces and surface roughness were federate and cutting speed. In addition, it was seen that the aging types caused a little effect on the cutting forces and surface roughness. It was determined that the T3 for cutting forces and T6 for surface roughness were very well.