Introduction: Tibia fractures in children are third most long bone fractures after forearm and femoral fractures, Titanium elastic nailing system (TENS) are good option for surgical treatment of pediatric tibia fractures due to their advantage of having quicker recovery, shorter rehabilitation period, less immobilization, lack of stiffness of adjoining joints and less psychological impact to the children The study had aim and objective to determine the demographic (age and sex distribution) of pediatric diaphyseal fractures of tibia, study the advantages of TENS., study the union rates and functional outcome of closed reduction and internal fixation of pediatric widely displaced diaphyseal fractures of tibia with. TENS and compare the results with those in literature. Methods: We included children and adolescents between the age group of 5-16 years with tibial shaft fractures were admitted to Vijayanagar Institute of Medical Sciences, Bellary from November 2020 to September 2022. All patients with displaced unstable fractures of diaphyseal fractures of tibia underwent elastic stable intra medullary nailing fixation for the sustained fracture. Surgery carried out after thorough clinical examination, radiography and routine investigations. Patients were followed up from 3 weeks to 6 months after surgery. Results: The study comprised 17 male patients and 13 female patients aged from 5 to 16 years with mean of 9.76years with time for union, in 13.3% it was 8 weeks, in 53.3% it was 10 weeks, in 33.3% it was 12 weeks. Conclusion: TENS is easy, simple, rapid, reliable and effective method for management of fractures between the age group of 5 to 14 years. This method has a short hospital stay, less operative time, minimal blood loss and reasonable time for bone healing. Complications associated with this method are minimal and can be minimized with effective management and precautions during surgery.