The real story behind Apple’s first foldable isn’t the screen, it’s the hinge
Apple’s foldable iPhone Ultra hinge decision between a complex liquid metal mechanism and a faster 3D-printed design will shape foldable phone durability, manufacturing scale, and how early buyers experience the most expensive iPhone launch to date. Apple’s foldable iPhone, expected to be called the iPhone Ultra, has entered mass production and is still targeting a September release alongside the iPhone 18 Pro. The design was reportedly finalized months ago and peak production is underway, with suppliers saying a September delivery window is “no problem.” Yet Apple has not locked in the final hinge technology, and will only decide by the end of July. That is a remarkable admission this late in the schedule: the company is effectively choosing between a more durable engineering showcase and a more scalable manufacturing path, even as hiring ramps and marketing expectations soar.
Liquid metal: the premium choice that could slow the iPhone Ultra down
If Apple wants the iPhone Ultra foldable hinge to feel like a once-in-a-decade hardware leap, liquid metal is the obvious choice. This amorphous alloy cools into a “metallic glass” rather than a rigid crystalline structure, which gives it high elasticity, scratch resistance, and the ability to snap back to its original shape. In plain terms, that means a hinge that tolerates the stress of opening and closing, resists wear, and maintains alignment over time—exactly what you want in a USD 2,000–2,500 (approx. RM9,200–RM11,500) foldable phone. But manufacturing a liquid metal hinge is more complex and difficult than using 3D printing. That complexity matters when Apple has reportedly raised production targets to around 10 million foldable iPhones for the year, up from 7–8 million. Choosing liquid metal signals that Apple is willing to accept fewer units and longer waits to deliver a hinge that feels worthy of the Ultra name.
3D printing: faster, more flexible, and potentially less proven
The alternative is a 3D-printed hinge system, similar in spirit to the titanium and 3D liquid printing hinge used in the Oppo Find N6, which earned certification for durability up to 600,000 folds. According to a well-known tipster, Apple has two options to keep the iPhone Ultra crease almost invisible: either liquid metal or 3D printing. If Apple can secure better memory supply and pricing, it can ramp production and switch to 3D printing technology, precisely because it is less complex than manufacturing a liquid metal hinge. That trade-off is enticing: faster scaling, more design flexibility, and a better chance of meeting demand for a device rumored to start around USD 2,299–2,399 (approx. RM10,600–RM11,100), nearly double the iPhone 17 Pro Max. The risk is that while 3D printing can produce intricate parts quickly, its long-term reliability in a mass-market hinge—even if inspired by successful competitors—is still less battle-tested at Apple’s scale.
Supply, delays, and the user experience: why the hinge choice will be felt at launch
The iPhone Ultra story is not only about metallurgy; it is about how many people get to experience Apple’s first foldable and when. Analyst Ming-Chi Kuo projects initial shipments of just 500,000 to 1 million units in the third quarter, around 10% of Apple’s total second-half output. That means buyers could face shipping delays of four to six weeks or longer at launch. Early hinge problems in testing now appear resolved, and production is accelerating. Still, the remaining hinge decision directly affects mass production and supply: if Apple stays with liquid metal, the iPhone Ultra may feel more exclusive, with constrained availability reinforcing its high-end image. If Apple leans into 3D printing, it could expand supply faster but risks making its first foldable feel less distinct from rivals. All this plays out against a device expected to pack a 7.8-inch inner display, 5.5-inch cover screen, A20 chip, Touch ID power button, and C2 modem in select regions.
Apple’s hinge decision will define expectations for foldable phone durability
By the end of July, Apple will choose between liquid metal and 3D printing for the iPhone Ultra foldable hinge, locking in not only its engineering character but its early reputation. If Apple picks liquid metal, it is clearly prioritizing foldable phone durability and thermal stability, even at the cost of more complex manufacturing and tighter launch supply. If it opts for 3D printing, it is betting that faster production and design flexibility outweigh potential concerns over long-term reliability, especially when early hinge issues are reportedly behind them. At a rumored USD 2,299–2,399 (approx. RM10,600–RM11,100) starting price, and with pricing estimates across reports generally landing between USD 2,000 and 2,500 (approx. RM9,200–RM11,500), the hinge choice becomes a philosophical statement as much as a technical one. Apple’s foldable will not be judged only on screens and chips; it will be judged on every open and close for years.
