A carbide-tipped masonry bit is needed to drill through tile.
Carbide-tipped masonry bits are available in diameters up to 1/2 inch.
For drilling into a solid wall, you'll need a masonry bit.
In practice, drills are restricted to standard masonry bits up to 13 mm (1/2 inch) in diameter.
The masonry bit shown here is a variation of the twist drill bit.
For drilling through tile or grout, use a carbide-tipped masonry bit.
Rotary hammers have such force, in fact, that the usual masonry bits are no longer adequate.
Drill holes for the fasteners with a carbide-tipped masonry bit, going into seams between the tiles if possible.
Drilling a hole into the wall with a masonry bit, the difference between hitting a stud and not will be clear.
This is more manifest with a masonry bit than a wood drilling bit.