The effect of alloying addition on the flow behavior of aluminum alloys was investigated. Three compositions were produced for this study including pure aluminum; aluminum–10wt% copper; and aluminum–10wt% copper–5wt% titanium. The bulk samples of these alloys were fabricated by mechanical alloying and hot consolidation. The flow behavior of the alloys under investigation was studied at room temperature by Stress–Strain-Microprobe® system and its Automated Ball Indentation® (ABI®) test method. The ABI experiment results were used to display the behavior of load-versus-depth of indentation (L–D), stress-versus-strain (S–S) behavior, yield strength, ultimate tensile strength, and ABI hardness. Pure aluminum revealed the lowest resistance to penetration and the weakest mechanical strength. The addition of copper to pure Al produced a higher resistance to penetration and augmented alloy strength. Adding Cu and Ti to pure Al exhibited the highest resistance to penetration and the strongest mechanical strength.