Left align column in align environment

Question

I am trying to make a list of mathematical objects, and I've been using the align environment to do so. This is my code:

\begin{align*}
& \textit{Title1} & \textit{Title2 for the second column}\\
& \{entry\}  &  \{entry\}    \\
& \{entry number 2\}         &  \{yet another entry\} 
\end{align*}

It produces the following, and I would like the second column to be left aligned as well. I've tried flalign but that doesn't give the correct result either.

Thanks in advance.

Answer 1

Use

\begin{align*}
& \textit{Title1}    && \textit{Title2 for the second column}\\
& \{entry\}          &&  \{entry\}    \\
& \{entry number 2\} &&  \{yet another entry\} 
\end{align*}

You need 2n-1 &'s per line. One & per alignment point, and n-1 to separate alignment columns. In this case n=2 so you need 3 &'s. You only used 2 and thus you get

right aligned (empty) & left aligned & (separator) right aligned \\

you wanted

right aligned (empty) & left aligned & (separator) right aligned (empty) & left aligned