In reply to Will Hempstead:
Well, as it happens, I tend to require particularly durable trekking poles for work (survey in mountain and wetland terrain, nearly always pathless and usually extremely rough ground, deep heather, scree, gloop, crags, hags, you name it).
I think it's fair to say any poles that are unfortunate enough to get into my ham-fisted paws tend to end up enduring extreme and prolonged use (even compared with expeditionary mountaineering abuse).
Over the past 30 years I've used lots of different types - both alloy and carbon - from a range of manufacturers - and bust most of them after a few seasons.
The only ones that I found are/were utterly bombproof were BD Contour Elliptic. The design was exceptional; it seems to be impossible to make them flex no matter how much weight you put on them in extremis - even when extended to maximum. Very reassuring on very steep sketchy descents.
Sadly they stopped making these about a decade ago - never discovered why (possibly because if you weren't assiduous in extending them completely when not in use they could become stuck together and then completely impossible to extend - in a far worse way than happens with conventional round profiled poles).
But if you looked after them - they were pretty much indestructible (I'm still using a pair after a decade of extreme battering - they look like they've been in a war zone with tons of scratches and scars, have had the tips and baskets replaced numerous times - but still going strong).
So if you ever see any second hand - you better grab 'em before I do!
The only other poles I've found that compare in burliness are Leki Makalu (the full-fat version) which is still available. But they are relatively heavy (the old BD Contour Elliptic wasn't that much heavier than a 'normal' pole) and Leki's version of the 'Flicklock' mechanism isn't as good.
However, of the current crop if (to paraphrase a old girl band), what you really really want is durability and reliability, I suspect it's the best that's going at the minute.
(As you say, arguably the most boring subject in the outdoor world!)