<p>Residual stresses remain a concern for industry because they can significantly impact the performance, safety, and lifespan of materials and components. Although there are many techniques for measuring residual stresses, each has its drawbacks and/or is expensive. In general, three tests were performed for each of the three conditions in both the characterization and residual stress tests. The measurement of residual stresses in a heat-treated aluminum alloy is analyzed using the indentation pair methodology (IPM), both directly and indirectly (with replicas). In addition to this procedure, the hole-drilling (HD) technique is used to compare both methods. Regarding the IPM, the results show an average difference of 5&#xa0;MPa between direct and indirect measurements. This is equivalent to an average variation of less than 2% of the yield strength of the aluminum alloy 6063-T6. Using metallographic replication allows for any measurement to be performed in a laboratory, which is advantageous when the measurement is performed on large parts that are difficult and/or inappropriate to move from their operating location. Upon comparing the results of the two techniques, it was observed that the IPM provided specific results, while the HD method offered a range of values for each test. At least qualitatively, the results of both methods were similar: the lowest stresses were consistently found in condition T0, followed by condition T4. The highest residual stresses were consistently found in condition T6. Specifically, the maximum and minimum residual stress values coincided in both methods.</p>