iPhone Duo Hinge Survives 32,000 Folds, But Screen Crease Deepens

The iPhone Duo survived 32,000 machine folds, matching a year of use, with its titanium hinge remaining sturdy but the inner screen crease visibly deepening. The custom 3D-printed titanium hinge stayed smooth and slightly stiffened over time, feeling identical to day one. However, the plastic inner display showed a noticeably deeper crease, more visible and easier to feel when swiping. The test, conducted by reviewer Joanna Stern over four nights, highlights the durability of foldable mechanics while exposing the natural limits of current bending screen technology.