I have repaired several rods where the owner has put the end of the tip section on the pea gravel that is slapton and beesands beaches. The wet pea gravel sticks to the outside and the inside of the tip section. The angler wipes the tiny pebbles off the outside, but the inside ones stick. Putting the rod in its bag involves inverting the rod, and the smaller pebbles detach and travel down the inside until they can go no further, and jam itself inside the blank. Now every time the rod is flexed by casting and retrieving, the pebble wears away the tube from the inside, which eventually snaps in mid-cast, and 80% of the time the pebble flies out, and the owner, with no evidence, blames the rod's maker. If repairable, I fit an internal spigot and an external sleeve, with a reinforcing whipping. The repair is usually about 2-3 inches long. The rings from the break to the tip of the rod have to be removed and re-fitted. In the last 25 years I have probably done 2 or 3 a year, I haven't had one back yet. Once repaired, I put a bit of foam rod grip up inside the blank, so it can't happen again...unless the owner removes it!
Hope this helps.