Question

"Ihave no title save that of an uncrowned soverign...." MEANING???

Answer 1

Basically there is no title

Answer 2

It means that  the person who is telling  this sentence --
 
    is not having any official title like a knight or king or prince at the moment, but he  worth  being crowned to be the ruler of the kingdom. 

He is treated and accepted as good person to be a ruler.  He has qualities of a ruler.  He also knows sword fighting and is brave ..