The right to marry is a right which is inherently and exclusively inalianable to man due to his/her being human.Hence this right should be respected and observed in any case and conditions.
One cannot be forced or obliged to marry with other contrary to his/her consent.This is a right which was warranted by the Turkish constitution and by the European convention on Human rights as well.

As far as the law of inheritance is concerned, be well sure of that the rejection of involuntarily marriage is not a lawful reason for "disherison" or "deprivation of inheritance" as known by the people as "disowning a heir".

As a result the case is mostly relevant with the conjugal responsibilities.If a family is to force their own son to marry under duress of depriving him from their care and maintenance this becomes a question of morals.Yet a claim for living maintenance is available, I do not think this may either be satisfactory or be influential for recovery.

So you got in hand the chances to refuse and resist! At least for your future and dignity for being a human.