Thanks. I do need it only on export, but even so, it doesn't seem to be
working:

http://i.imgur.com/1tMGaHz.png

Again, it's inside an HTML code block. Not sure if there's a way to make it
work inside that block?

#+BEGIN_HTML
...
<div class="page-header">
  <h1>{{{title}}}</h1>
</div>
...
#+END_HTML



> {{{title}}}  should do it. See
>
>     (info "(org) Macro replacement")

Actually, I'm not sure it will do: macro replacement takes place during
export, so it may or may not be enough, depending on what you really
want to do.