The 23-year-old's previous contract at Gresty Road was due to expire at the end of the season.
Davis made his first-team debut in 2010 after coming through the club's youth system.
Crewe are currently in 20th place in the League One table, two points above the relegation zone.
They return to league action on Saturday with the visit of MK Dons.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Walsall | 36 | 20 | 8 | 8 | 65 | 41 | 24 | 68 |
| 2 | Bradford CityBradford | 36 | 19 | 9 | 8 | 48 | 30 | 18 | 66 |
| 3 | Doncaster RoversDoncaster | 36 | 18 | 8 | 10 | 53 | 43 | 10 | 62 |
| 4 | AFC Wimbledon | 35 | 17 | 9 | 9 | 46 | 23 | 23 | 60 |
| 5 | Notts County | 35 | 16 | 10 | 9 | 53 | 37 | 16 | 58 |
| 6 | Port Vale | 34 | 15 | 13 | 6 | 43 | 35 | 8 | 58 |
| 7 | Crewe AlexandraCrewe | 36 | 14 | 14 | 8 | 44 | 37 | 7 | 56 |
| 8 | Grimsby Town | 35 | 17 | 5 | 13 | 51 | 51 | 0 | 56 |
| 9 | Colchester UnitedColchester | 35 | 12 | 16 | 7 | 40 | 32 | 8 | 52 |
| 10 | Bromley | 36 | 13 | 12 | 11 | 46 | 43 | 3 | 51 |
| 11 | Salford City | 35 | 13 | 11 | 11 | 43 | 37 | 6 | 50 |
| 12 | Fleetwood TownFleetwood | 36 | 12 | 13 | 11 | 49 | 43 | 6 | 49 |
| 13 | Swindon TownSwindon | 36 | 11 | 13 | 12 | 52 | 52 | 0 | 46 |
| 14 | Cheltenham TownCheltenham | 35 | 12 | 10 | 13 | 46 | 50 | -4 | 46 |
| 15 | Chesterfield | 34 | 12 | 9 | 13 | 52 | 43 | 9 | 45 |
| 16 | BarrowBarrow | 35 | 12 | 7 | 16 | 38 | 41 | -3 | 43 |
| 17 | Newport CountyNewport | 35 | 12 | 7 | 16 | 45 | 56 | -11 | 43 |
| 18 | MK Dons | 35 | 12 | 6 | 17 | 46 | 50 | -4 | 42 |
| 19 | Gillingham | 35 | 11 | 8 | 16 | 30 | 38 | -8 | 41 |
| 20 | Harrogate TownHarrogate | 36 | 11 | 7 | 18 | 29 | 45 | -16 | 40 |
| 21 | Accrington StanleyAccrington | 35 | 9 | 9 | 17 | 39 | 54 | -15 | 36 |
| 22 | Tranmere RoversTranmere | 36 | 7 | 12 | 17 | 27 | 55 | -28 | 33 |
| 23 | Morecambe | 36 | 8 | 5 | 23 | 31 | 54 | -23 | 29 |
| 24 | Carlisle UnitedCarlisle | 35 | 6 | 9 | 20 | 25 | 51 | -26 | 27 |
| > League Two Full Table | |||||||||
