Hi Greg,
I have a number of two piece rods, including a few Tcurve two pieces that lock up after fishing and prove very difficult to separate.
I have found the best solution is some talcum powder, or dry graphite lubricant. I have tried wax, grease and lanolin spray but they all seem to bind up once they have sat in the sun for a day and the wax/grease melts away and almost forms a glue.
cheers
Sam