Palavi scored the highest points after scoring a total of 67 goals, enabling her side to beat Samoa 79-53.
The game showcased tough competition from both teams but Tonga proved to be the toughest and led after the first quarter 23-10.
This is before the team extended their lead 45-17 in the second quarter and stayed in the lead right after the third quarter 66-30.
Tonga will face Fiji in the semifinals and Samoa will also Singapore in the same round.
Both games will be held tonight.