title vs be known as

title is a noun but be known as is not a noun.

Word	Noun	Adjective	Verb	Adverb
title	Yes	No	Yes	No
be known as	No	No	Yes	No

As verbs, be known as is a hypernym of title; that is, be known as is a word with a broader meaning than title:

Other hypernyms of title include call, know as, name.

As verbs, be known as is a hypernym of title; that is, be known as is a word with a broader meaning than title:

Other hypernyms of title include call, know as, name.

title (noun)	be known as (noun)
an established or recognized right
an informal right to something
the name of a work of art or literary composition etc.
a general or descriptive heading for a section of a written work
an identifying appellation signifying status or function: e.g. `Mr.' or `General'
an appellation signifying nobility
a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it
a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with
(usually plural) written material introduced into a movie or TV show to give credits or represent dialogue or explain an action
the status of being a champion

title (verb)	be known as (verb)
give a title to	look on as or consider
designate by an identifying term	assign a specified (usually proper) name to