Manipulate header "title" from header "title"

[Michael Scheer]

Hi Lilypond users,

I access a pieces global header via an include, it is accessed from
different files.

Now in the full score, I need bigger headers. So this is my first test,
but Lilypond complains about recursive use of the title.
I thought it is called sequential and should be no problem. But it is.

Will it be even possible to manipulate header:title after its definition?

% CODE %
\header {
  \include "include/title.ily" % in the include, there is a 'title =  "my 
title"'
  title = \markup { \huge \fromproperty #'header:title }
}
% CODE %

TY -
Best regards
Michael