Interestingly, the peak of the Mn dissolution during the holds around iteration 7 coincides with the peak in the activity and surface area, implying that a transformation of the surface comes to a halt at this point. After the initial surface composition change, more stable MnxTiyOz alloys reside at the interface to the electrolyte. Subsequently, the Mn dissolution decreases between iterations 7 and 14, which could be attributed to the stabilizing effect of Ti toward Mn, as demonstrated in previous reports. It would be expected that the dissolved amount of Mn during the ASTs shows the same trend. Instead, it keeps rising as the iteration progresses, ascribed to the harsher conditions applied during ASTs with longer exposure to fluctuating potentials. Past iteration 14, the sample deactivates fully, shown by the sudden drop in activity accompanied by a final rise in Mn dissolution caused by the high potentials before ceasing to near zero. This Mn dissolution increasing toward the end supports the hypothesis that the drop in Mn leaching during iterations 7 and 14 comes from the Ti-stabilized Mn rather than solely from a simple depletion of the sample.