I need to refer to a model described elsewhere, from a section title, like
\section{Analysis of model X}
One way of referring to a model is to create a new counter, and then write
\section{Analysis of \cref{grandmodelofeverything}}
But now hyperref will complain because of invalid token, and it does not look good in the TOC either, especially since the titles of the sections the describe the models are more descriptive than
\section{Model 1}
They are currently like
\section{Adding the effect from Y processes}
Do I need to invent semi-descriptive long names like "The model by Authors with this modification" or can I live with these quirks?

\texorpdfstringto render a plain-text version of the header for the ToC and hyperlinks, and the hyperlinked version for the header in the body of the document. – Mike Renfro Jul 22 '15 at 15:32\crefisn't expandable, so this is no good idea to use it in a section title. The comment by Mike Renfro is a good starter – Jul 22 '15 at 16:43