Foldable iPhone to Feature 'Metallic Glass' Hinge [Rumor]

Apple will use a 'Metallic Glass' material for the hinge of a new foldable iPhone, according to a recent post from leaker Instant Digital. The claim, shared on Weibo, aligns with earlier insights from analyst Ming-Chi Kuo and sheds light on the innovative material choice for Apple's long-rumored foldable device.

Instant Digital's full post, translated from Chinese, reads: "Apple iPhone foldable device hinge material: amorphous alloy (metallic glass). Advantages: amorphous particle structure, better resistance to bending, deformation, and dents, strength and hardness 2.5 times higher than titanium alloy, and better glossiness (basically close to the premium feel of stainless steel that you all like)." This description highlights the material's durability and aesthetic appeal, key factors for a premium foldable device.

The leaker's mention of metallic glass, also known as amorphous alloy, echoes a report we covered earlier from Ming-Chi Kuo of TF International Securities. Kuo predicted Apple would use liquid metal—another term for this material—to craft essential components like hinges for its foldable iPhone. He noted that the company might employ a die-casting process to enhance durability, improve screen flatness, and reduce creasing on what's expected to be a 7.8-inch inner display. The material's strength, reportedly 2.5 times that of titanium alloy per Instant Digital, supports Kuo's emphasis on its suitability for mechanically critical parts.


Kuo's analysis also pointed to Dongguan EonTec as a potential exclusive supplier of liquid metal components. By late 2024, EonTec had shipped over 10 million central shafts—hinge elements made from this material—indicating significant preparation. The Weibo post doesn't name a supplier, but its details reinforce the idea that Apple is leaning toward this advanced alloy for its foldable design.

The foldable iPhone, envisioned as a book-style device, is expected to feature a titanium alloy outer casing paired with a hinge blending stainless steel and titanium, per Kuo. Instant Digital's note about metallic glass offering a stainless steel-like gloss suggests it could complement this premium aesthetic. Kuo also projected a 5.5-inch outer screen, with the device measuring 9–9.5mm thick when folded and 4.5–4.8mm unfolded, specs that hinge durability will be crucial to support.

Production timelines remain unconfirmed in the Weibo post, but Kuo previously estimated mass production could begin in Q4 2026, with initial shipments of 3–5 million units.

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