Titanium is by far the lightest of all wedding ring metals, followed closely by steel. Silver and palladium have similar weights which are practically indistinguishable in a ring.
Palladium's extra light characteristics though (a little more than one third lighter than gold) is why palladium wedding bands are more affordable than gold or platinum bands, even though palladium is rarer than gold or platinum - it's just that less of the metal (in weight) is needed to make the ring.
Gold and tungsten almost have identical weights, with tungsten being just a bit lighter than gold. Platinum is a touch heavier than gold, and iridium weighs in as the heaviest wedding ring metal.
The weights of a wedding or engagement ring will depend too though on how much of the metal is used to create the ring, any additional metals that were alloyed with the main ring metal, and types of diamonds or gemstones incorporated into the ring's designs.
