# Use of New and Light Materials in Automotive Engineering for Towing System
## 1 Introduction
The recycling of composites is another aspect that must be considered when using them. This is difficult due to their inherent heterogeneous nature. However, environmental legislation requires that all materials be properly recovered and recycled. Various technologies have been developed for composites. We list mechanical recycling, thermal recycling, and chemical recycling. Studies on the recycling of composites have proposed efficient separation and recovery technologies [9; 10; 11]. Applications of composites and their manufacturing methods are presented in numerous studies [12; 13; 14]. After iron, aluminum has become the most widely used metal, and among its countless advantages are the following, which are useful in research:  
* It is a light metal, which is why it is used in the naval and aeronautical industry;
* It is a good electrical and thermal conductor, weaker than copper, but much lighter, which is why it is used in the electrical industry;
* It is a ductile and malleable metal, with the possibility of obtaining thin sheets with a thickness of 0.005 mm, which is why it is used in the food and pharmaceutical industries;
* It has a high resistance to corrosion, which is why it is used in corrosive environments. Pure aluminum has rather poor mechanical properties, and to improve its characteristics, various alloying elements can be added, obtaining aluminum alloys that, depending on their application, have much more effective properties (Table 1). If between 1990 and 2000, the steel mass of a car was 50-60% of the total mass, according to the automotive research center (CAR), currently, the steel mass of motor vehicles is about 15%, and by 2040, will reach about 5% of the total mass. Today, leading automobile manufacturers frequently use aluminum alloys for most components in their construction. If in the automobile industry, these alloys are used for bodywork elements, wheels, and cables, as well as in the composition of engines and transmissions, in this paper,we will try to use them for components of the towing system, more precisely, to make an alternative towbar to the steel one. A number of car components are currently manufactured from aluminum or aluminum alloys [15; 16]. The range of aluminum applications in the automotive industry is extremely varied. The strategies used for and the possibilities of using cast or forged alloys are analyzed in [17]. The purpose of using aluminum in automotive applications is mainly determined by reducing the weight of automotive components [18; 19; 20]. The properties of aluminum are enhanced within aluminum alloys. For example, the AlSi5 Cu2 Mg alloy has proven to be very suitable for the manufacturing of cylinder head castings for the automotive industry. An evaluation of the influence of Ti addition (0.1; 0.2; and 0.3 wt% Ti) on the properties of the AlSi5 Cu2 Mg alloy was studied in [21]. Other properties of the alloys used in the automotive industry can be found in [22; 23]. Bioinspired lattice structures made of aluminum have an extremely wide range of applications, especially in the aerospace and automotive industries. This is mainly due to their high strength to weight ratio. A comparative study between the theoretically obtained solutions and the experimental results of an aluminum alloy (MLS AlSi10 Mg) and magnesium alloy (WE43) additively manufactured by selective laser melting is presented in [24]. Also, a check with the Finite Element Method (FEM) validated the results obtained. Other results on the applications of aluminum alloys in the automotive industry can be found in [25]. The accelerated use of aluminum in industry poses additional problems in terms of recycling the material. Recently, a series of new techniques proposed, including laser-induced breakdown spectroscopy (LIBS) and solid-state recycling, represent new and promising ways to recycle this material. In particular, solid-state recycling by compression and extrusion at ambient temperature can lead to energy savings and minimal metal loss [26].