Title not being rendered with LaTeX - latex

Question

So I have the following document:
\include{preamble}
\title{test title}
\begin{document}
\maketitle
\begin{equation*}
\begin{aligned}
\pi\sqrt{\pi\sqrt{\pi\sqrt{\pi\sqrt{\pi\sqrt{\pi\dots}}}}}
\end{aligned}
\end{equation*}
\bibliographystyle{plain}
\bibliography{references}
\end{document}
the contents of my preamble.tex file is:
%%%%% Document Setup %%%%%%%%
\documentclass[10pt,onecolumn]{revtex4} % Font size (10,11 or 12pt) and column number (one or two).
\usepackage{times} % Times New Roman font type
\usepackage[a4paper, left=1.85cm, right=1.85cm,top=1.85cm, bottom=1.85cm]{geometry} % Defines paper size and margin length
\usepackage[font=small, labelfont=bf]{caption} % Defines caption font size as 9pt and caption title bolded
\usepackage{graphics,graphicx,epsfig,ulem} % Makes sure all graphics works
\usepackage{amsmath} % Adds mathematical features for equations
\usepackage{etoolbox} % Customise date to preferred format
\usepackage{subcaption}
\usepackage{caption}
\makeatletter
\patchcmd{\frontmatter#RRAP#format}{(}{}{}{}
\patchcmd{\frontmatter#RRAP#format}{)}{}{}{}
\renewcommand\Dated#name{}
\makeatother
\usepackage{fancyhdr}
\def\bibsection{\section*{References}} % Position reference section correctly
\usepackage{import}
\usepackage{pdfpages}
\usepackage{transparent}
\usepackage{xcolor}
\newcommand{\incfig}[2][1]{%
\def\svgwidth{#1\columnwidth}
\import{./figures/}{#2.pdf_tex}
}
\pdfsuppresswarningpagegroup=1
For some reason the title just will not be included on the pdf when I compile the code, I am sure I have \title{} and \maketitle in the correct positions. Any help as to why this is would be much appreciated.

Answer 1

Move the title after \begin{document}:
\documentclass{revtex4}
\begin{document}
\title{test title}
\maketitle
\end{document}
(don't do this with other documentclasses. Most of the time it is better to have the \title in the preamble, e.g. to get sensible pdf meta data if combined with hyperref)