I've tried setting my PROMPT_COMMAND variable:
PROMPT_COMMAND='echo -ne "\033]0;"myWindowTitle"\007"'
but something changes my tab (or the whole terminal title) to 'user@hostname:/current/path', thus
PROMPT_COMMAND='echo -ne "\033]0;"myWindowTitle"\007" && sleep 3'
changes title for 3 second only :)
\
in front of$WT
, then you can change the WT variable 'in live', and it will immediately change your terminal title :-) – Gillenwater