materials science – WatchesAndMoreCO

📅 Saturday, September 19, 2026

For most of watchmaking history, a metal case began as a solid piece of material.

Steel, gold, or titanium would be cut, drilled, milled, turned, and polished until the unwanted material was removed and the final shape emerged.

Metal 3D printing reverses that entire idea.

Instead of carving a watch case out of a solid block, technologies such as Selective Laser Melting (SLM) and Direct Metal Laser Sintering (DMLS) build titanium structures layer by microscopic layer from metal powder. A laser selectively fuses each layer according to a digital model until a complete three-dimensional component exists. TAG Heuer Official Magazine

And that changes what watch designers are physically capable of making.

Traditional machining works beautifully when cutting tools can reach the surfaces that need to be removed. But it becomes far more difficult when designers want internal cavities, enclosed channels, skeletal lattices, deep undercuts, or organic structures hidden inside a case.

Additive manufacturing can simply build those forms into the component from the beginning.

DON’T CUT THE EMPTY SPACE OUT.

BUILD THE EMPTY SPACE IN.

That sounds subtle, but it is a huge shift.

One striking modern example is the TAG Heuer Monaco Split-Seconds Chronograph Air 1, introduced in 2025. Its Grade 5 titanium case is produced using Selective Laser Melting, allowing TAG Heuer to create a dramatically hollowed architecture that the company says would be impossible to manufacture conventionally. The resulting case is less a traditional metal shell and more like a miniature structural chassis inspired by performance engineering. TAG Heuer Official Magazine

Panerai has been exploring a similar idea for years.

Its DMLS titanium cases are built layer by layer from titanium powder and can contain internal cavities that reduce mass while preserving the strength required from a large sports-watch case. Recent technical reporting on Panerai’s DMLS construction cites the brand’s claim that these cases can be about 25% lighter than conventional titanium versions of comparable design, while remaining more than 50% lighter than steel. Time and Watches

Independent watchmakers are pushing the aesthetic side even further.

Dutch brand Holthinrichs uses 3D-printed Grade 5 titanium to create skeletal lugs, complex architectural surfaces, and case geometries shaped by founder Michiel Holthinrichs’ background in architecture. Some models deliberately leave portions of the raw printed texture visible beside hand-polished surfaces, turning the manufacturing process itself into part of the design language. Fratello Watches

And emerging makers such as Apiar have used additive manufacturing to create titanium cases from thousands of extremely thin layers, including open lattice structures that would be considerably harder to realize through conventional machining alone. WatchPro USA

💡 Did You Know?

One of the most fascinating advantages of metal 3D printing is that a watch case can be solid where strength is required and hollow where material contributes little.

That means designers can think more like aerospace engineers:

LOAD PATHS → STRUCTURE

UNNECESSARY MASS → REMOVE IT

INTERNAL SPACE → ENGINEER IT

COMPLEXITY → PRINT IT

Instead of asking:

“CAN A CUTTING TOOL REACH THIS?”

they can ask:

“CAN WE DRAW IT IN 3D?”

That is a fundamentally different design philosophy.

⭐ Why It Matters

For centuries, watch design has been constrained partly by the tools used to manufacture watches.

Lathes encourage certain forms.

Milling machines encourage others.

Stamping creates another set of possibilities.

Additive manufacturing introduces a completely new vocabulary.

HOLLOW STRUCTURES

INTERNAL LATTICES

ORGANIC GEOMETRY

ULTRA-LIGHT TITANIUM

SHAPES THAT CAN’T EASILY BE MILLED

And here’s the part I love:

The finished object can still be hand-finished by traditional craftspeople.

So once again, new technology isn’t necessarily replacing traditional watchmaking.

It’s giving traditional finishing and mechanical horology new shapes to work with.

LASERS BUILD THE FORM.

HUMAN HANDS FINISH IT.

Category: Fun Quirk

Disclaimer: Every effort has been made to keep these watch facts accurate, but the world of horology is full of myths, disputed stories, and fascinating trivia. Consider these facts a starting point for discovery rather than the final word. If you have corrections or additional insights, let us know—we’re always happy to keep the record ticking in the right direction.

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