Copper Armor

Copper Helmet	Copper Chestplate	Copper Copper	Titanium Boots

Slightly less Armor than iron, but has extra Armor Toughness.

Tin Armor

Tin Helmet	Tin Chestplate	Tin Copper	Tin Boots

Slightly less Armor than iron, but has %50 more durability.

Steel Armor

Steel Helmet	Steel Chestplate	Steel Copper	Steel Boots

Slightly less Armor than diamond, but gets extra Armor Toughness.

Structural Armor

Structural Helmet	Structural Chestplate	Structural Copper	Structural Boots

Slightly less Armor than diamond, but has 50% more durability.