Twisted Vitautas Jokubauskas was jailed for killing a man in a brawl in 1992 in his native Lithuania, the court heard.
He served a brief sentence and moved to the UK about 10 years ago, Southwark Crown Court heard.
Sentencing him to life with a minimum of 20 years Judge Nicholas Loraine-Smith said: “You are now 58 years old and I bear that in mind when considering the minimum sentence I will pass.
“You’ve already been responsible for another man’s death but the sentence passed back in 1992 shows your criminal culpability then must have been minimal.
“I can’t ignore that conviction but it plays a negligible part in my sentence.
“When you met Ramute Butkiene it must have been all but immediately obvious to you that she was an alcoholic and she deserved your care and your help.
“The medical evidence and the evidence of others and even your own evidence – unreliable as I found it to be, shows that she suffered a series of beatings at your hands.
“You accept that you had assaulted her on a number of occasions but I have absolutely no doubt that you have significantly minimised the number of these assaults and there severity.
“In the two or three months prior to her death there must have been three or four serious attacks leading to broken ribs and which she was probably too frightened to report to the police or to go to hospital to be treated.
“For certain this was no pre-meditated attack, but such mitigation that there is in that is diminished by the fact that it was the last in a series that had led to broken bones.
“I’ve no doubt that it was your possessiveness and jealousy that led you to lose your temper that night – firstly because you thought she had run away to a previous partner and then you learned she had rung him, which you saw as a betrayal.
“On the evidence you brutally beat her then almost certainly strangled her, although we will never know for certain.
“You claimed that you loved her, but what I saw was a desire to possess and control her.”
He continued: “With a callous butchery you set about cutting up her body and hiding it in various parts of the neighbourhood.
“There’s at least some mitigation in your pleas of guilty to manslaughter and preventing lawful burial of a body, but they have not been accompanied by any convincing signs of remorse.
“Self-pity, yes, but remorse for the taking of a life? Very little.’
“The sentence I must pass is a sentence of life imprisonment, significantly aggravated by the physical suffering that you inflicted on Ms Butkiene on a number of occasions prior to her death and it’s significantly aggravated by the manner in which you treated her body.’
Jokubauskas,57, of Mayor’s Walk, Peterborough, did not react as his sentence was read out.
Ten members of the jury had remained behind to see him be sentenced.