Answer: The term “titans” refers to great people, not in size but spiritual giants. There were titans and giants before the deluge. They attained the upper world within the ego, which could imagine the spiritual level on an egoistic level, which is the smallest, negligible level.
They were not great egoists. But specifically thanks to their having negligible ego, they could move with great ease through all the properties and all the strata of the spiritual world. So they were called titans.