\documentclass{article}
\makeatletter
\show\@title\show\@author
\title{Titel}
\show\@title\show\@author
\usepackage{hyperref}
\show\@title\show\@author
\author{Autor}
\show\@title\show\@author
\begin{document}
\maketitle
\section{Hello World}
\end{document}