Though I did not state it originally, let me make it abundantly clear that I am a very strong proponent of using hiking sticks / poles / pacer poles TGWO of whatever floats your boat.
I suppose if I were NOT a chunky monkey, and perhaps half my age, I could do without. But at 64, and with gamey joints, in addition to being born top-heavy, the poles are an absolute MUST.
I used a variety of excellent Leki poles for my first four Caminos, then switched to a pair of Black Diamond (BD) FLZ carbon fiber poles on my most recent, fifth Camino.
The Leki poles offer outstanding value for money and are the world standard for traditional hiking poles. They are made in the Czech Republic (or at leat they were the last time I checked) and are of high quality.
The BD poles are a much lighter and easier on the wrist and lower arm muscles. The difference in weight is relatively slight, viewed overall. But the carbon fiber poles weigh HALF as much as the aluminum alloy poles. You realize this at the end of a seven or eight hour walking day when your wrists are among the few muscle groups that DO NOT ache.
Also, when fully collapsed, the BD poles are only about 16 inches or 41 cm long. So, they better fit in rucksacks and luggage. They fit into a vertical side pocket of my Osprey Kestrel rucksack and are completely hidden from view.
However, the BD poles, as most all carbon fiber poles, do have drawbacks. They are less flexible laterally. So, if you needed to stress the pole, like bend it lengthwise, it could shatter or crack faster than aluminum. Metal poles have more "give" or flexibility. However, mine worked great in all weather.
Also, the cosmetic finish is less durable than the traditional aluminum poles. My new BD poles fell a few times, at least once with me attached, on my recent Camino. Now, they have customized scratches all along the shafts. As the poles are finished in dark grey or black, scratches are more evident. Or well, they ARE made to be used. So, now they are "veterans" and have the surface wounds to prove it.
The final drawback to carbon fiber over aluminum poles is the cost. My BD poles cost about triple what comparable, traditional twist lock Leki poles cost me in the past. But, I still like them.
I hope this helps.