Galaxy Z Fold8 Ultra measures 4.1mm when unfolded and weighs 215g. It is Samsung’s thinnest Galaxy Z Fold yet. To achieve this slim design, Samsung reworked the display structure, materials and internal architecture as one connected system.

Making a foldable thinner is a complex engineering challenge. The display must withstand repeated folding. The hinge, battery, thermal system and other components must also fit within the device. Each component must work seamlessly with the others.

Samsung therefore took a system-level approach to the design. This helped the company reduce the device’s thickness while maintaining the flexibility and strength required from a foldable.

Flex Titanium Supports a Thinner Display

Samsung introduced Flex Titanium as part of the new display structure.

Flex Titanium combines a titanium plate with a titanium-alloy film. The titanium plate sits beneath the display and provides structural support. It also helps absorb pressure and impact from both sides of the device.

Samsung developed a precision-engineered lattice structure for the titanium plate. This structure allows the plate to remain flexible while maintaining its strength.

The titanium-alloy film sits beneath the display panel. It provides additional strength, flexibility and elastic recovery. It also supports the repeated folding that is central to the Galaxy Z Fold experience.

A Thinner Display Creates More Internal Space

Samsung reduced the thickness of the display module by 10%. This created additional space inside the device for components such as the battery, thermal system and camera.

Galaxy Z Fold8 Ultra also features a 5,000mAh battery and an 8-inch main display. The slimmer display structure helped Samsung maintain these capabilities within a thinner overall design.

Galaxy Z Fold8 Ultra measures just 4.1mm when unfolded.

Samsung tests the complete foldable system

Samsung did not treat thinness as a standalone design goal. The company engineered the display, hinge and internal components together.

Samsung subjected the latest Galaxy Z series to more than 100 reliability validation tests. These tests covered drops, repeated folding, pressure, moisture and debris.

The testing helped Samsung assess the complete device under conditions that reflect everyday use.

Every Millimetre Matters

Galaxy Z Fold8 Ultra brings together advances in materials, display engineering and internal architecture. The result is Samsung’s thinnest Galaxy Z Fold yet.

The device demonstrates how changes to one part of a foldable can create opportunities across the entire product. Samsung’s approach focuses on making every millimetre count while preserving the strengths of the foldable form factor.