Waterjet excels with heat-sensitive materials like titanium, aluminum, and composites that warp or delaminate under laser or plasma cutting. It’s also the best option for thick metals over 2 inches, brittle materials like glass and ceramics, and stacked cutting of thinner sheets. Because there’s no heat-affected zone, you can cut hardened tool steels without changing their properties, and work with laminates or bonded materials without separating the layers. Stone, marble, and granite are also ideal for waterjet since mechanical cutting often causes cracking. Essentially, if heat, mechanical stress, or material thickness makes traditional methods impractical, waterjet is usually the answer.