Titanium

~40% lighter than steel for the same volume. It can be anodized to vivid interference colors (blue, purple, gold, green, teal) without dye, since the color comes from light interference through a thin oxide layer. Excellent corrosion resistance, hypoallergenic, and slightly warmer to the touch than steel. More common as wa handle ferrules and fittings on high-end custom Japanese knives than as full handle slabs.