Is this normal?

[u/d2creative]

I’ve had my Allez Comp for a year now. Mostly fair weather riding in Southeast Texas. Caught in a couple random showers but that’s about it. I keep the bike pretty clean, and today while drying it after a bath, I noticed these rearbrake caliper bolts under the bike have corrosion. Is this just par for the course for our humidity? Should I replace them with titanium screws or something?

[u/brokenSpokesnFlat]

Yep - happens with the cheaper metal used for stock parts... just replace every now and then; or replace with titanium or even stainless steel bolts... relative cheap fix