1kg Titanium Cube (~55mm x 55mm x 55mm)

Yes. Each metal cube is a solid piece of the material stated in its specifications, rather than a hollow shell or plated object. That matters because the point of the cube is to make properties such as density physically tangible: equal-sized cubes in different metals can feel dramatically different in the hand.

Use the dimensions in the individual product specifications as the reference for that cube. Each cube is machined as a precise geometric object with chamfered edges, so the faces are flat and the corners are comfortable to handle.

That depends on the metal. Copper develops a patina, a unique darkening of the material which makes every piece special. Titanium, tantalum and niobium change very little. Keep a cube clean and dry if you'd prefer to hold on to its original look.

For routine care, wipe the cube with a clean, soft cloth and avoid abrasive cleaning that could alter the finish. If the surface has changed naturally, particularly on copper, decide whether you want to preserve that patina before using any metal-cleaning product.

Because density is mass packed into a given volume. Two cubes can have exactly the same dimensions but contain very different amounts of mass because their materials have different densities. Comparing equal-sized cubes is one of the simplest ways to experience that material property directly rather than as a number in a table.

It measures approximately 55mm on each side. Those dimensions are what it takes for this Grade 2 titanium cube to reach a total weight of 1kg, giving it noticeably more volume than a one-kilogram cube made from a denser metal.

Equal weights do not require equal volumes. A lower-density metal needs more material volume to reach one kilogram than a denser metal does. That is why the dimensions of one-kilogram cubes can differ even though the scale reads the same weight.