Titanium is more rare than iron; also is more difficult to prepare titanium from ores.
Yes, brass is cheaper than copper.
It's more expensive than ordinary steel, but it's cheaper than titanium.
Compared to what? It's cheaper than steel, or aluminum, and so far it's cheaper than plastic.
Steel was lighter, cheaper, and stronger than iron, allowing for constructions and technologies that were impossible before. Steel was important to Second Industrial Revolution because it was much lighter compared to iron. --------------- It was cheaper than iron.
Chrome is more durable and cheaper than stainless steel.
Because cardboard is cheaper than steel.
It is cheaper and easier to manufacture than aluminum, fiberglass, carbon fiber or stainless steel bodies.
Steel was lighter, cheaper, and stronger than iron, allowing for constructions and technologies that were impossible before. Steel was important to Second Industrial Revolution because it was much lighter compared to iron. --------------- It was cheaper than iron.
Cheaper than press steel wheels and lighter
Steel is cheaper and easier to weld, and form into complex shapes. There are some cars made from aluminum.
It's strong enough, lighter than steel and cheaper than carbon fiber and titanium.
Aluminum roofing may be cheaper and much more affordable than steel roofing however, steel roofing has proven to be much more reliable. It can resist different weather conditions and lasts much longer than aluminum.