\usetikzlibrary{shapes}

\begin{tikzpicture}
\node [shade, rounded corners, draw=black!60, rectangle split, rectangle split parts=3, text ragged] {
            \textbf{Title}
       \nodepart{second}
            A
       \nodepart{third}
            B
        };
\end{tikzpicture}

Split rectangle nodes in tikz

LaTeX