{titles} is about typesetting document titles, usually with the help of \maketitle or the titlepage environment. A popular package is {titling}.
To influence the formatting of \maketitle
or the titlepage
environment, you can use the titling package, which also lets you use the \title
, \author
and \date
information throughout the document.
sectioning is about commands like \chapter
or \section
, which in turn can be modified with the titlesec package.