Just MHO, I can't see much benefit to routinely removing press-fit bearings, especially in OP's situation. Repeated removal and reinstallation is going to ruin the close tolerances.
From a chemical standpoint, the electronegativity of Al and Ti are pretty close, indicating there won't be much corrosion between them. You might get a bit more between Al and the iron in the bearings; however, if the bearings were properly greased during assembly, there won't be much of a path for moisture or oxygen, so it should be good for a long time.
Now if OP lives or rides near salt water, I'd suggest talking to the mechanics at the LBS to see what they see and do. Leave the bike outside on the beach for months at a time? a. don't do that. b. it might cause problems.