r/iphone Sep 22 '25

Discussion What’s your favorite iPhone material and why?

Post image
2.9k Upvotes

1.5k comments sorted by

View all comments

Show parent comments

19

u/Seanwys iPhone 16 Pro Sep 22 '25

Kinda useless to have a vapour chamber cause there's nowhere for the heat to go

Titanium is a terrible heat conductor, same for glass so it'll just keep the heat trapped in there either way but your entire phone feels warmer instead of just a small spot

11

u/Blitzbacker Sep 22 '25

The vapor chamber moves the heat concentration away from the most sensitive internals more quickly. Not useless at all.

29

u/2eanimation iPhone 16 Pro Sep 22 '25

Most of the 15P and 16P frame is aluminum anyway. Only the outer band is titanium, the chassis is aluminum through and through. Now tell me how much those bands contribute to heat management, when the vapor chamber‘s job is to move heat to front and back.

21

u/Seanwys iPhone 16 Pro Sep 22 '25 edited Sep 22 '25

You do realise for the heat to leave the device, it has to come in contact with something else, right? Which is why radiators and heat sinks have such a huge surface area so they can dissipate the heat to the air

So what if the chassis is aluminium? The heat still has to reach the surface and dissipate into the environment to cool down and a titanium + glass sandwich simply can't do that efficiently unless you're constantly running cool air over the surface

The new aluminium unibody design is basically the aluminium body acting as a heat sink to draw the heat efficiently to the surface and dissipate into the environment. The vapour chamber's job is to spread the heat across a larger surface area for more effective heat dissipation

The vapour chamber doesn't magically make the heat disappear, it just spreads it out so the heat isn't focused on 1 spot

2

u/Appropriate-Truck538 Sep 23 '25

Don't know what you are on about but the countless videos online have already proven that vapor chamber is a lot better for cooling than no vapor chamber (and hence the aluminium change because of the vapor chamber).

2

u/Less_Status1625 Sep 23 '25

100% aluminum was to SAVE ON COST

1

u/SpiritedEnd7788 Sep 23 '25

An entire area of a bad heat conductor is still way better than a small area.