After tibia fracture surgery, after 3~6 months of X-ray review shows that the fracture is well healed and adapt to the ground, then you can gradually start to walk off the crutches under the care of your family.
After 3~6 months after tibia fracture surgery, after the primitive bone scab formation period is completed, the strength of the bone scab can support part of the gravity. Therefore, if the X-ray is reviewed in about 3~6 months and if it shows good healing, you can start walking on crutches with the affected limb on the ground under the care of your family. After a period of adaptation, you can start walking without crutches.
However, it is important to note that the first time you take off the crutches to walk, must have someone to look after, assist, to avoid the discomfort of walking lead to re-injury.