Hi there, welcome to HCM, thanks for your question. There is no correlation between insertion of titanium rods in femur and the sensation of fatigue from what we know form current available literature. However it is possible that you might feel week in your legs after such an injury and surgery due to the lack of use of the muscles of the lower limb.This is something similar to disuse atrophy. It is advisable to do strengthening exercises of all the muscles around your lower limb under the supervision of your physician and a trained physiotherapist.It is possible that over a time frame of 3 to 6 months your will start feeling better strength which such exercises. On the other hand if you are feeling general fatigue including your whole body general factors like anaemia should be considered.It is possible that you would have lost considerable amount of blood during your injury and during your surgery, which can result in anemia.Based on certain blood tests you might require supplements to help you recover from such a situation. Regarding feeling cold, low grade smouldering fever can sometimes make you feel cold.Since you have an implant in your body it would be better to see your treating physican to rule out the same.Examination and some blood tests can provide evemidence regarding the samend Hope this answers your question.All the best Thank you. with best regards Dr SBK