Howe, 6ft 8ins, came into the ring more than three stones heavier than his opponent but was stunned when a hook from Davidaitis found his whiskers before the Luthuanian followed in with two more punches to send him down.
In a local derby for a Masters middlewight belt, Liam 'Cannonball' Cameron (15-3) was outpointed 95-96 by Rod Smith. Cameron was given a count in the third round.
Elsewhere on the bill, Driffield Troll Hunter Curtis Woodhouse (21-6) was kept busy with a six round points win over Poland's Arek Malek (13-64-4), Nottinghamshire super bantamweight Leigh Wood recorded a four round shutout over Lithuanian Simas Volosinas (4-14).
Barnstaple middleweight Tommy Langford (7-0) remained unbeaten with a six round point win over Pocklington Rocket Harry Matthews (12-11-2), and Rossington southpaw Maxi Hughes (10-1-1) came out on to against Gloucester's Andy Harris (3-10) after an accidental head clash left Harris cut over the left eye. It was halted in the fifth round after a doctor's inspection.
The action will be available on the Coldwell TV app.
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