temporary marriage longs only for a specified period of time and man and woman will separate from each other after the expiration date w/o divorce. If a fixed period of time is not clearly specified then the marriage reverts to a long term marriage and separation can only happen to death and divorce and all the rules of the regular marriage apply.

If the period is specified then after the expiration date, they must either extend it to another specified time or they will automatically separate w/o divorce and the women must count her "Iddah" (grace period) before w/c she cannot marry anyone else.