## 1 Introduction  
Ultra-high molecular weight polyethylene (UHMWPE) is deemed as the right material for the connecting parts of total joint replacements (TJR), such as hip and knee joints, in different forms, such as straight and cross linked. UHMWPE is chosen due to the high fatigue and wear resistance, high toughness against fracture, and biocompatibility when compared to other kinds of polymers [1; 2; 3]. In order to know the outcomes and lifespan of a TJR material, the following parameters are considered: oxidation consistency, and the mechanical and wear properties of the composite materials [4; 5]. The hip joint is among the most powerful synovial joints in the human body. A point of concern with regard to substitution of hip joints is the osteolytic condition of the acetabular attachments in the course of time; osteolysis stimulates antagonistic reactions in the soft tissues, which are caused by the particles delivered due to the counteracting metallic parts, necessitating correction by medical procedure [6; 7]. In the later years, such corrections by medical procedure have expanded: at present, 5% of revision surgeries after two years of the initial procedure are done only for the sterile extraction of the inserts [8]. Different researchers have proposed various techniques, such as cross linking of polymers, inclusion of fillers and particulate, and so forth [9; 10; 11], to overcome the issue of osteolysis. While the metallic contacts interface with the acetabular bearing, the inclusion of fillers and particulates into UHMWPE drastically decreases the friction and wear rate, which ultimately increases the enactment of the polymer. The addition of these reinforcements into the UHMWPE is improved by compression molding technique rather than injection molding, where the flow of UHMWPE is not supported due its viscosity [12; 13]. The usage of several particles as reinforcements for the polymer-centered composite materials brings together the application of reinforcements of numerous dimensions to attain physical characteristics that are superior to using a single filler. The idea of using multiple fillers is needed for an intelligent outcome, which helps to achieve an improvement in the tribological and mechanical properties of the resulting composite. Sensible enhancements on the wear properties were seen on such UHMWPE composites with various reinforcements in tandem [14; 15; 16]. A few particles that have been utilized by researchers for strengthening the composites after considering enhancement of the properties of UHMWPE are as follows: a single or multiwalled carbon nanotube (SW or MWCNT) [17; 18], graphene/graphene oxide (GO) [16; 19], carbon fiber (CF) [11; 20], zirconia [21], nano-Al\({}_{2}\)O\({}_{3}\)[22; 23], nano/micro hydroxyapatite (HAP) [24; 25], and nano-SiO\({}_{2}\)[26]. A noticeable impact is the boosting of the characteristics of these composites by these fillers or particulates, accompanied by the modification of its effects. Considering the abovementioned factors, it was proposed that numerous micro/nano particles may have the chance of improving various properties simultaneously. [PERSON] et al. have investigated that there is a tremendous rise in the mechanical properties of the UHMWPE nano HAP composites by in situ filling, especially Young's modulus and the yield strength. He also observed a 38.2% reduction in the average coefficient of friction (CoF) values with 1% nano HAP fillers with UHMWPE [27]. [PERSON] et al. [28] and [PERSON] et al. [29] have elaborately reviewed the use of carbon fibers with the UHMWPE composites that provide enriched properties, both in mechanical and tribological behavior, owing to the interaction between the carbon fiber and UHMWPE. [PERSON] et al. observed that with the increase in GO content from 0.1 to 1%, UHMWPE-GO composites showed a drop in COF value and wear ratio [30]. On adding CNT to UHMWPE, the wear resistance of the composite increases, uplifting the load-bearing capability, and the same has been investigated by [PERSON] et al. [31].