Charles Fyfe Morrison was found guilty of five charges – including three serious sexual assaults - following a trial at the High Court in Paisley on June 12.
The 27-year-old targeted the women at various locations in the Paisley and Edinburgh areas over a four-year-period.
He forced one victim to settle debts he had accrued, sold her belongings, took out loans in her name and forced her to take out mobile phone contracts on his behalf.
He monitored and quizzed her about her mobile phone activity and isolated her from her friends, family, and healthcare professionals.
Morrison would throw household items, strike walls and other surfaces close to her as well as shouting, swearing and utter threats towards her.
The abuser forced his victim to take medication prescribed to him and prevented her from leaving a property.
During the abuse, Morrison violently assaulted the woman and held scissors to her abdomen.
His second victim was subjected to a similar campaign of violence which saw him hold a knife to her stomach.
He also forced her to send him money and to borrow funds from relatives, without paying it back.
During their relationship, Morrison subjected the woman to violent attacks including choking her, all to her injury and the danger of life.
The abuser removed her mobile phone from her to prevent her from calling for help and threatened to harm her dog.
On July 11, at the High Court in Paisley, Morrison was given a nine-year extended sentence, with a seven-year custodial term.
His name has been added to the sex offenders register for an indefinite period.
Non-harassment orders, preventing him from contacting or attempting to contact, both victims were granted for a 15-year period.
Scotland’s Procurator Fiscal for High Court Sexual Offences, Katrina Parkes, said:
“Charles Fyfe Morrison is a dangerous individual who subjected his victims to unimaginable trauma and abuse over a number of years.
“It is thanks to the bravery of these women that this prosecution has been possible.
“I would urge any victim of similar crime not to suffer in silence but to report it and seek support.
“You will be listened to and we will use every tool available in seeking justice.”