If you are at an airport and look into the front of any of the large turbofans, you'll see the giant front fan with anywhere between 32 and 42 blades. Each blade weighs about 15 lb. on large engine and is approx. 24" in length. The blade was made from a solid block of titanium in most engines and it costs well over $25,000. to make.

Titanium is a perfect material for this application.........strong and relatively ductile. The blade won't fracture if the engine hits a bird at 300 mph.

The only reason that it's not on the Cessna is cost.