Suppress frame title when using allowframebreaks in beamer

Redefine the template frametitle continuation to clear the current title:

\documentclass{beamer}
\makeatletter
\setbeamertemplate{frametitle continuation}{\gdef\beamer@frametitle{}}
\makeatother

\begin{document}
\begin{frame}[allowframebreaks]{Title}
A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\
\framebreak
B\\ B\\ B\\ B\\ B\\ B\\ B\\\framebreak B\\ B\\ B\\ B\\ B\\ B\\
\end{frame}

\begin{frame}{New Title}
A\\ A\\ A\\ A
\end{frame}

\end{document}

This is an alternative via \setbeamertemplate{frametitle continuation}. Inspired by the fact that a simple \setbeamertemplate{frametitle continuation}{} still print the Title name, without numbering though. So print the Title again with white color.

\documentclass{beamer}
\setbeamertemplate{frametitle continuation}{\frametitle{\color{white}Title}}
\begin{document}
\begin{frame}[allowframebreaks]{Title}
A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\ A\\
\framebreak

B\\ B\\ B\\ B\\ B\\ B\\ B\\ 

\framebreak 
B\\ B\\ B\\ B\\ B\\ B\\
\end{frame}
\begin{frame}{Not a title frame}
C\\C\\C\\C\\
\end{frame}
\end{document}