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Doing some research on anodized aluminum, it looks like while anodizing strengthens the surface of the aluminum, that can make the aluminum susceptible to cracking, depending on the strength, as the hardened anodized surface can be brittle (reminds me a bit of tungsten, which is supposed to be the strongest metal but it has little tensile strength and will crack when bent, unlike titanium, which has more give). *However*, certain kinds of anodizing (sulphuric acid anodizing) can weaken the fatigue strength of the metal down the line, as the acid can weaken the non-anodized metal. But given how little stress these parts take and how thin they are (leading to thicker anodized layer relative to the rest of the part), I don't think fatigue strength would be an issue.
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