There are many templates available online for helping the students or other people who need help for their presentation.
Generally, a thesis defense consists of two phases.
As per this useful link - thesis is a collective effort of a student, which shows his or her ability to perform individually by what he or she has learned throughout their studies. Most students take it for granted and consider it to be just a long essay which they have to write on a given topic, but universities add this thesis in their course as a major so that students can learn to act on their own and they get prepared for the challenges that they might have to face in the future during their professional life.
The thesis defense is the presentation of your thesis in front of an experienced panel of staff and you have to convince them if they ask any questions about your work and you have to do it by providing proof of everything that you have written in your thesis.
Following three things must be your key to defend a thesis.