Aluminium: rigid, handsome, hinge-dependent
Aluminium is the default premium material and for good reason: it is stiff, it takes a nice finish, and a weighted aluminium base resists sliding. Almost every attractive desk stand on the market is anodised aluminium over a rubber-padded foot.
The catch is that aluminium stands are almost always folding stands, which means the real product is not the metal but the joint. Friction hinges wear. The wear is gradual and invisible until the day your phone slowly nods forward while you are typing on it. There is no user-serviceable fix; the joint either holds tension or it does not.
If you buy aluminium, buy for a fixed location and expect the adjustment mechanism, not the metal, to be the thing that ages.
ABS plastic: cheap, light, ratchet-limited
ABS is the budget workhorse. It moulds cleanly, it is light, and it costs almost nothing, which is why sub-$10 stands are usually ABS with a ratcheting back leg.
ABS fails in two ways. Ratchet teeth round off with repeated adjustment, so the angle you want stops being one of the angles you can get. And thin ABS sections go brittle with UV exposure — a stand that lives on a car dashboard has a much shorter life than one that lives in an office.
For a fixed desk at a low price, ABS is perfectly rational. For daily carry, it is a false economy.
TPE and elastomer bodies: no joint to fail
Thermoplastic elastomers behave like a stiff rubber. They flex, grip, and return to shape, which makes them ideal for slot-based stands that hold a device by friction rather than by clamping it.
The interesting property is not the material itself but what it lets a designer do: if the device is held by a flexible slot, the stand does not need a hinge at all. Remove the hinge and you remove the single most common long-term failure point in this entire product category.
Elastomer stands trade adjustability for durability. You get the angles the mould provides, not an infinite range — but you get them for years, and they tolerate kitchens, bags and glove boxes in a way that metal folding stands do not.
Weight, base area and why stands slide
Stability is a function of three things: total mass, how low that mass sits, and the coefficient of friction between the base and the surface. A light stand with a large silicone base can outperform a heavy stand with hard plastic feet on a stone counter.
Test it the way I do: put your device in, tap the screen twenty times as though you were typing, and count how many times the stand moves. Anything above zero on a dry, flat surface is a stand you will end up steadying with one hand for the rest of its life.
Matching the material to the room
Office desk, one device, aesthetics matter: aluminium. Second desk or spare stand on a strict budget: ABS. Kitchen, car, bag, shared household, or anywhere the stand will be picked up and moved: an elastomer body with no hinge.
The most common buying mistake is choosing on looks for a use case that punishes joints. A beautiful aluminium cradle on a kitchen counter is a stand you will replace in a year.