Since carbon tubing may vary in quality across a wide range, it should not be assumed that it is all of the same quality. Unfortunately, unlike tent pole tubing, trekkng pole tube is more difficult and expensive to break test (not many would buy a new pair and try to break test them, because to measure the force required at the break point, you must of course break them).
Faced with this dilemma, bought a pair of Yukon Charlie carbons, because the lower two sections were made of alloy. and replaced the cheap grips with some very firm extended foam grips taken from ski poles made in Europe. So they weigh 7 1/2 oz each, rather than around 6 1/2 oz like the Zpacks, but I no longer worry about breakage in the lower sections. Surprisingly, the Charlie’s flic locks are very durable – so no problems at all. And a bonus: the Charlies are stiffer than the ski poles and I find them more pleasant to hike with, without all the bowing on rough ascents and descents.
I think we will see more carbon poles with alloy tube at least on the lowest and narrowest section that is both weaker and subject to breakage in crevices and similar pole destroyers.