Yes, absolutely. In fact, this is one of the primary reasons industries such as aerospace, medical device manufacturing, and defense choose waterjet cutting over laser or plasma. A waterjet cuts titanium, Inconel, Hastelloy, Monel, and other exotic alloys with zero heat-affected zone (HAZ).

Why No HAZ Occurs

A heat-affected zone is created when a thermal cutting method—laser, plasma, or EDM—raises the base material's temperature above its recrystallization or phase transformation point. The rapid heating and cooling alter the microstructure, creating a zone of hardened, softened, or cracked material adjacent to the cut edge. This zone can reduce fatigue life, promote corrosion, and cause part failure under stress.

Waterjet cutting is a purely mechanical erosion process. The abrasive particles accelerated by high-pressure water physically remove material by micro-chipping and shearing. There is no combustion, no melting, and no heat input beyond a tiny frictional rise (typically less than 100°F or 38°C at the cut zone). The bulk material remains at room temperature. Therefore, the crystal structure, hardness, tensile strength, and corrosion resistance of titanium or Inconel remain completely unchanged right up to the cut edge.

Specific Benefits for Titanium

Titanium is highly reactive at elevated temperatures. When cut with laser or plasma, titanium absorbs oxygen and nitrogen from the atmosphere, forming a brittle, discolored "alpha case" layer that must be ground off before welding or use. Waterjet produces a clean, silvery, unoxidized edge with no alpha case. This eliminates costly secondary operations and preserves the metal's excellent fatigue and corrosion properties.

For thin titanium sheet (under 0.125 inches), a pure waterjet without abrasive can cut cleanly, leaving a burr-free edge ideal for medical implants or aerospace ducts. For thicker titanium plate (up to 6 inches or more), abrasive waterjet cuts smoothly while maintaining full metallurgical integrity.

Exotic Alloys That Benefit Most

Inconel and Hastelloy (nickel superalloys): These alloys work-harden under thermal cutting, creating cracks. Waterjet produces stress-free edges.

Monel (nickel-copper): Retains its excellent seawater corrosion resistance because no heat alters its surface chemistry.

Tantalum and Zirconium: Extremely heat-sensitive. Waterjet is the only practical profiling method for these metals.

Beryllium copper and other precipitation-hardened alloys: Waterjet does not disturb the carefully controlled heat treatment.

Limitations to Consider

While waterjet eliminates HAZ, it does have other considerations. The cut edge will have fine striations (drag lines) rather than a mirror-smooth laser finish. There is also a slight taper (typically 0.001–0.003 inches per side) unless a dynamic waterjet head is used. Additionally, the abrasive particles may become embedded in very soft or ductile alloys, though this is rarely a functional issue.

For titanium and exotic alloys where metallurgical integrity is critical, waterjet is the proven, go-to solution. It delivers a true HAZ-free cut, preserves material properties, and eliminates post-processing costs associated with thermal damage.