My old 2 piece boat rod, is now a one piece, because it fused together and will not part. Do you have a problem like this with any of your fishing rods rods?
There seems to be no easy fix for this problem. Over time the joint becomes a perfect fit and combine that with some water and you have an airtight seal. With some extreme temperature you have a recipe for disaster.
The best thing to try before brute force, is allowing your fishing rod to dry out and reach room temperature. This often allows the rod sections to part. The application of some candle wax can also prevent this happening again in the future.
Having a fused rod will not effect its capacity, but have you tried getting a 14 foot cod rod into a mini!!!