It is right that the heating speed of an object is related to its density, because the greater the density, the closer the molecular arrangement of the object, and the heat transfer depends on the collision of molecules, and the closer it is, the faster it will be! The transfer of heat is actually the mutual conversion of thermal energy and kinetic energy, so it has high density and fast heat dissipation. However, the speed of heating is also related to the structural form of the object. Tiles are actually porous structures, and there are many holes in them (so tiles will absorb water), so I personally think that it is not appropriate for you to say that tiles dissipate heat quickly when heated. Everything is relative, which is different from its purpose!