Latex: Expand header width under IEEEtrans template

refer to:

Extending side margins for Title section in IEEEtrans document class

Latex: Expand header width under IEEEtrans template

\parboxThe purpose of expanding the title width can be achieved through keywords, for example:

\documentclass[conference]{IEEEtran}

\begin{document}

\author{The author}
\title{\makebox[\linewidth]{\parbox{\dimexpr\textwidth+2cm\relax}{\centering I want to make a title that its length is adjustable and that can span into maximum two lines instead of three now}}}

\maketitle

\end{document} 

renders as follows:

2018.5