What does the (Ti+Carbon) mean on the Palio 8603?

[PenHoldSandro]

I recently bought the Palio 8603 over the Yinhe 985, and I am confused about what the Ti+Carbon means on the blade. As an extra question, what does 5+2+2 ply mean?

 

[Snek]

Titanium Carbon. 2 layers of carbon and 2 titanium layers.