steaming
The boiling point of water at your altitude (9700 feet) is about 20 degrees F. under 212 F. Temperature, as well as moisture, plays a significant part in benidng wood -- instrument makers (of guitars and violins, for example) usually bend their dry wood over a hot pipe, with no steam. I don't know what the ideal temperature is for bending wood, but your steam, at 193 F., is going to take more time to raise your wood to the proper temperature than steam at 212 F. will, assuming that heating your wood to no more than 193 F. or less is high enough in the first place. I would think at a minimum you should try a significantly longer time for your steaming.
White oak is rot resistant because it does not readily soak up liquid water -- soaking for several days might raise the wood's moisture content because water vapor has passed into the wood, but I would not expect the interior of white oak to feel wet, especially when warm or hot, after only a few days (or even weeks) of submersion.