It has for quite awhile been 40 characters for the original title, but in the 'reply' box (see above) there are 50 characters available.
I 'believe' this limit was fixed by our former tech guru and main programmer, Jeff..(Pene Azul). I don't know that anyone has tried to alter it in recent years.
Title lengths can be affected by the prefix one chooses (obit/BS/tech)

I'm not sure whether Max has personally addressed the issue.